To see the other types of publications on this topic, follow the link: Design Structure Matrix (DSM).
Dissertations / Theses on the topic 'Design Structure Matrix (DSM)'
Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles
Consult the top 50 dissertations / theses for your research on the topic 'Design Structure Matrix (DSM).'
Next to every source in the list of references, there is an 'Add to bibliography' button. Press on it, and we will generate automatically the bibliographic reference to the chosen work in the citation style you need: APA, MLA, Harvard, Chicago, Vancouver, etc.
You can also download the full text of the academic publication as pdf and read online its abstract whenever available in the metadata.
Browse dissertations / theses on a wide variety of disciplines and organise your bibliography correctly.
1
Jin, Shengzhe. "Quality Assessment Planning Using Design Structure Matrix and Resource Constraint Analysis." University of Cincinnati / OhioLINK, 2010. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1292518039.
Full text
2
Jun, Jonathan Ho. "An abductive approach to Design Structure Matrix (DSM) partitioning using frequency domain scoring." Thesis, Massachusetts Institute of Technology, 2018. http://hdl.handle.net/1721.1/118547.
Full textAbstract:
Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, System Design and Management Program, 2018.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 65-66).
A key benefit of the DSM representation is that it gives a visual interpretation of relationships between its elements. The array format allows us to sort the elements using clustering algorithms which try to group the relationships into modules which are as independent as possible. There are a number of clustering algorithms available which may each end up sorting the DSMs differently using different objectives, for example, activities in a time-based DSM can be sequenced to reduce iterations or to improve concurrency. However, most of these algorithms take a deductive approach which results in only one 'optimal' output. If an abductive approach is used instead, multiple solutions can be generated for the user to evaluate, some which may provide insight on useful configurations that he or she may have overlooked. In electrical engineering, we often make use of transforms to convert time domain signals into frequency domain signals in order to glean additional information which may not have been initially apparent. In this respect, using a frequency domain transform on a DSM matrix gives us additional insights into the relationships represented. An example of one such insight would be into the sorted-ness of a DSM to which module cuts can be defined. By applying a frequency transform to a pixel representation of the DSM and examining the transform coefficients, we gain an understanding of what image patterns exist in the DSM. Rules pertaining to these coefficients could then be defined which would classify a DSM as well sorted (with the dependencies being grouped up) or being unsorted (with the dependencies being scattered). This thesis demonstrates the above technique to rank each permutation of an 8x8 matrix on their conformance to certain rules or behaviors in order to filter out useful configurations in an abductive approach. When comparing the highest-ranking hypotheses against the optimal result from other clustering and sequencing algorithms, this algorithm performed on par with them to reduce external dependencies and iterations respectively. The frequency based scoring was also shown to be a useful metric when determining the optimal module cut of a system.
by Jonathan Ho Jun.
S.M. in Engineering and Management
3
Kristof, Gary Michael. "Planning Business Improvement using Analytic Hierarchy Process (AHP) and Design Structure Matrix (DSM)." Thesis, Montana State University, 2005. http://etd.lib.montana.edu/etd/2005/kristof/KristofG1205.pdf.
Full textAbstract:
Many management system engineering ideas and theories have evolved to help businesses grow and achieve their goals. Applying these ideas and theories to a business system is a strategic planning issue and results in a bewildering array of strategic alternatives for business system improvement. Choosing the appropriate alternatives is a complex and difficult decision. The most appropriate strategic alternative must be executable. To be executable the strategic alternative must not only be technically feasible, but must also overcome social and cultural obstructions. This research presents a planning approach to select the most appropriate strategic alternative and to plan its implementation. The planning approach is built on a planning framework synthesized from previous research. This framework involves the following planning functions: 1. Determine business strategic alternatives 2. Acquire business knowledge 3. Shape business for strategic advantage 4. Implement plan - operational engagement The planning approach uses Analytic Hierarchy Process (AHP), Project Management Tools (PMT) and Design Structure Matrix (DSM) to implement these functions and plan business improvements. This research demonstrates that rational hierarchies appropriate for strategic alternatives analysis using AHP can be constructed. Business scenarios are used to show that AHP method prioritizes alternative strategies differently under different business circumstances. In addition, the data generated by the AHP can be aggregated into statements of work and input into DSM to generate a project plan to implement organizational design changes and achieve strategic intent.
4
Bulloch, Benjamin (Benjamin Edward), and John Sullivan. "Application of the Design Structure Matrix (DSM) to the real estate development process." Thesis, Massachusetts Institute of Technology, 2009. http://hdl.handle.net/1721.1/54851.
Full textAbstract:
Thesis (S.M.)--Massachusetts Institute of Technology, Program in Real Estate Development in Conjunction with the Center for Real Estate, 2009.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student submitted PDF version of thesis.
Includes bibliographical references (p. 93-95).
This thesis presents a pioneering application of an engineering systems framework, the Design Structure Matrix (DSM), to model the real estate development (RED) process. The DSM is a process modeling tool that originated recently in the branches of engineering systems and management science, and is primarily used to study product development processes. The DSM is an n-squared graphical matrix representation of a process that is particularly well suited to model both the sequential and iterative informational relationships between tasks in a product development process. The similarities between product development and the real estate development process make DSM an excellent fit for applying the DSM. The thesis first reviews existing models of the RED process but finds them lacking a combination of granularity and ability to model the highly iterative nature of the RED process. This limits their effectiveness for conveying information useful to practitioners. No previous RED model describes the process at a task level or has the ability to model iterative or sequential information flows between tasks. The DSM developed in this thesis first presents a normative or baseline model of a RED project. The model was developed through the participation and assistance of MIT/CRE industry partner, Jones Lang LaSalle (Boston Office). Through a series of interviews and meetings, the authors first developed a Six Stage Event Sequence model of RED with decision-gates found to occur during the process. The six stages were then expanded with JLL's assistance into a table of 91 individual tasks necessary for successful completion of a RED project.
(cont.) Finally, again with JLL's engagement, the 91X91 'Baseline' RED process DSM was constructed, identifying 1,148 planned informational inter-task interactions (out of 8,281 potential interactions). The 'Baseline' DSM model was then manipulated to highlight important aspects of the RED process including the iterative and interdisciplinary nature of RED. Several typical development scenarios are then modeled to highlight the utility of DSM as a management tool in practice. The models show how unplanned iteration can become a significant cause of project risk and failure. They also highlight the risks and opportunities that task re-sequencing can have on a project. This thesis demonstrates the DSM to be a useful and effective model of the RED process enabling new insight and understanding. The highly complex and iterative RED process can be graphically modeled in great detail in a visually appealing manner. Additionally, the RED DSM proves to be an adaptive and manipulative tool that allows for a multi-layer grasping of the RED process, able to assist in project management, change management, identification of risks and opportunities, and firm-level organizational structure and procedures. Additionally, the RED DSM model proves to be a useful pedagogical device for teaching real estate students.
by Benjamin Bulloch and John Sullivan.
S.M.
5
Gualberto, Ana Cristina Ferrari. "Aplicação da ferramenta DSM - Design Structure Matrix ao planejamento do processo de projeto de edificações." Universidade de São Paulo, 2012. http://www.teses.usp.br/teses/disponiveis/3/3146/tde-04062013-143901/.
Full textAbstract:
O presente trabalho apresenta uma análise da aplicação da ferramenta DSM Design Structure Matrix ao planejamento do processo de projeto de edificações. O objetivo principal desta pesquisa é a análise dos Manuais de Escopo de Projetos e Serviços para a Indústria Imobiliária do ponto de vista do planejamento do processo de projeto, utilizando a ferramenta DSM. Para desenvolvimento da pesquisa primeiramente foi feita uma revisão bibliográfica, onde selecionou-se a metodologia ADePT para o desenvolvimento do planejamento do processo de projeto. Em seguida foram aplicadas as duas primeiras etapas da metodologia ADePT definição do processo e otimização do processo, que forneceram material para uma análise da aplicação da ferramenta DSM ao planejamento do processo de projeto e uma análise crítica sobre os Manuais de Escopo de Projetos e Serviços para a Indústria Imobiliária. O cumprimento das duas primeiras etapas da metodologia ADePT forneceu material com informações que permitiram a observação de algumas incoerências e permitiu a apresentação de críticas e sugestões de alterações em seu conteúdo, como proposta de melhoria à ferramenta-guia que estes se propõem a ser. Por fim, a partir da validação da DSM como ferramenta para o desenvolvimento do planejamento do processo de projeto e com base nas alterações sugeridas para os manuais, foi proposto um novo modelo de processo de projeto.This study presents an analysis of application of DSM Design Structure Matrix to the planning process of building design. The main objective this study is the analysis of manuals Scope of Projects and Services for the Real State Industry in terms of planning the design process, using the DSM. For development of the study was first done a literature review, where we selected the ADEPT methodology to development planning this process. When we applied the first two stages of ADEPT methodology process definition and optimization of the process, which provided material for an analysis of the implementation of DSM planning in the design process and a critical analysis of the Manuals Scope of Projects and Services for Real State Industry. Compliance with the first two stages of ADEPT methodology provided material with information that allowed the observation of some inconsistencies and allowed the presentation of comments and suggestions for changes in content, as proposed improvements to the tool guide that they purport to be. Finally, from the validation of the DSM as a tool for development planning and design process based on the suggested changes to the manuals, we proposed a new model of the design process.
6
Go, Julie W. "Case studies in DSM : utilizing the Design Structure Matrix to improve New Product Introduction." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/39588.
Full textAbstract:
Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; and, (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division; in conjunction with the Leaders for Manufacturing Program at MIT, 2007.Includes bibliographical references (p. 63).
This thesis describes a project that applies the Design Structure Matrix (DSM) in support of the Manufacturing Excellence (MX) program at Cisco Systems, Inc to reduce the cycle time of new product development initiatives (NPI). Because they are inherently iterative with interdependent tasks, NPIs are difficult to manage. Two case studies applying the DSM were performed and used to study the inputs and outputs of the process as well as the dependencies between the process steps. Both case studies indicated that defining product requirements and needs upfront helped to eliminate rework later on in the process. The DSMs also showed that cycle time and standard deviation of cycle time were especially sensitive to interactions between changes in the Bill of Materials (BOM) and other tasks. In fact there was a "tipping point" where reducing the dependency between tasks could yield significant reductions in cycle time and standard deviation of cycle time. More significantly, the case studies highlighted the large number of stakeholders involved in the process and revealed the degree to which engineering and manufacturing must work together to reduce NPI cycle times.
(cont.) In fact, the name "Manufacturing Excellence Initiative in NPI" is a misnomer. New Product Introduction is not just the job of manufacturing but is highly integrated between such groups as marketing, design, and engineering. If the Mx Initiative in NPI is to fully meet its potential, all of these groups must fully realize this. In addition, there is a need for process infrastructure, data infrastructure, and close examination of incentives. This thesis thus shows that in order for Cisco's process improvement initiatives to succeed, buy-in from all relevant stakeholders must be won.
by Julie W. Go.
S.M.
M.B.A.
7
Baudin, Mathieu. "Piloter la Complexité : Utilisation de DSM et de l'algèbre d'intervalles d'Allen pour la planification collaborative." Thesis, Paris, ENSAM, 2014. http://www.theses.fr/2014ENAM0027/document.
Full textAbstract:
Cette thèse propose une méthodologie de pilotage d'organisations complexes, ens'intéressant à de nouvelles méthodes de planification collaborative et d'optimisation d'interventions en environnements soumis à des rayonnements ionisants. En nous basant sur l'étude d'installations scientifiques et technologiques complexes tels que celles du CERN à Genève (Suisse) et de la GSI à Darmstadt (Allemagne), nous y analysons les besoins et contraintes de planification imposés par les environnements à risques en général, et par lesrayonnements ionisants en particulier. Les implications liées à la collaboration sont ensuite détaillées, et un modèle ontologique d'intervention est proposé afin de sélectionner les méthodes les plus adaptées au problème étudié. La méthode proposée dans cette thèse repose sur des techniques éprouvées en planification de projets ainsi qu'en conception de produits comme la Design Structure Matrix (DSM). Elle introduit en revanche dans ces domaines des méthodes habituellement rencontrées en intelligence artificielle : les algèbres temporelles qualitatives et la propagation des contraintes temporelles, ainsi que la recherche de compromis en cas de conflit. Cette « DSM Collaborative » a été implémentée dans une application prototype testée sur des cas pratiques au CERN et à la GSI, dont le premier est décrit dans l'ultime chapitre de cette thèse. C'est une approche qui place la ressource(essentiellement humaine) et les contraintes temporelles au coeur du processus de planification. Elle met l'accent sur la collaboration entre les différents participants, ainsi que sur la simulation et la comparaison multicritère de multiples scenarii plutôt que sur la recherche d'un unique optimum souvent irréalisable sur le plan pratiqueThis work proposes a methodology to handle complexity in organizations byfocusing on innovative and collaborative planning and scheduling methods dedicated to the optimization of interventions in environments emitting ionizing radiations. By taking as work environment highly complex and technological scientific facilities such as the ones of CERN in Geneva (Switzerland) and GSI in Darmstadt (Germany), we analyze the needs and requirements induced in intervention planning and scheduling by hazardous environments in general, and then more specifically by ionizing radiations. The implications of collaborative work are then scrutinized, and an ontological model for interventions is designed in order to select the methods best suited to our problem. The framework we present in this work relies on methods sucessfully used in project planning and scheduling and innovative product design like the Design Structure Matrix (DSM). It also introduces in these fields methods borrowed to artificial intelligence planning and scheduling such as the temporal qualitative algebras, constraint propagation, and the search of compromises in case of conflicts. This so called “Collaborative DSM” has been implemented in a prototype software application tested at CERN and GSI on practical applications. The very first one and its results are presented in the final chapter of this thesis. This framework aims at placing resources (mostly human resources) and temporal constraints at the heart of the planning and scheduling process. It focuses on collaboration between the different actors involved, from coordinators to technicians, and on simulation and multiple-criteria comparison of several scenarios, rather than searching for a unique optimum, which often tends to be non-practical, should one even be found
8
Bonelli, Steven V. (Steven Vincent), and Guerra Adrián M. González. "Application of the Design Structure Matrix (DSM) to the real estate development process using modular construction methods." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/78241.
Full textAbstract:
Thesis (S.M. in Real Estate Development)--Massachusetts Institute of Technology, Program in Real Estate Development in Conjunction with the Center for Real Estate, 2012.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Cataloged from student-submitted PDF version of thesis.
Includes bibliographical references (p. 111-112).
Real estate development (RED) has traditionally been a very dynamic business, where real estate developers strive to turn an idea into a real asset, by delivering a quality project on time and on budget. In recent years, Modular Construction Methods (MCM) has arisen as an innovative solution to commercial RED projects that require higher levels of the three aforementioned factors, with a special emphasis placed on time. The purpose of our thesis is to explain MCM and its impact on RED by analyzing the interdependent relationships between the different tasks performed during the course of a development. We have accomplished this by using the Design Structure Matrix (DSM), a systems engineering tool, to map out the dependencies between development tasks in a graphical manner. To develop our DSM model for an RED process that uses MCM we conducted interviews with the senior management at RJ Finlay, a New Hampshire based full service real estate firm and Keiser Industries, a modular manufacturing company that operates in Maine and is owned by RJ Finlay. To fully understand the real application of the MCM process to RED, we met with the general contractor, lead architect and project management team for 30 Haven, a commercial RED that uses MCM. 30 Haven is located in Reading, Massachusetts and has been co-developed through an integrated project delivery (IPD) process by RJ Finlay and Oaktree development, using an in-house general contractor and Keiser Industries as its modular manufacturer. Our interviews occurred weeks before the project was completed in the summer of 2012. This allowed us to interview the involved parties about the whole process from inception to construction completion. This helped us further understand the actual problems a RED process using MCM can face throughout the preconstruction and construction processes. We then developed a DSM that showcases the different stages that a RED process using MCM have to go through and the planned and unplanned iterative processes for each stage. Planned iterations are feedback loops between tasks that are meant to rework tasks that forcibly need it, while unplanned iterations reflect feedback loops that occur because of unexpected events. Our thesis has focused on proposing proactive solutions to the unexpected events (referred to as "failure modes") a RED process using MCM can face, by either eliminating them or minimizing their likelihood and impact. The DSM helped facilitate the development of both a normative model and an optimal one, where our solutions for the unplanned iterations were applied. We complemented our findings with a hypothetical financial model that uses the normative and optimal DSM models to show the difference between both in terms of the returns, time and cost for a generic multifamily RED that uses MCM.
by Steven V. Bonelli and Adrián M. González Guerra.
S.M.in Real Estate Development
9
Sachidanandam, Vignesh. "Handling research data at the front end of the design process." Columbus, Ohio : Ohio State University, 2008. http://rave.ohiolink.edu/etdc/view?acc%5Fnum=osu1217515976.
Full text
10
Baudin, Mathieu. "Piloter la Complexité : Utilisation de DSM et de l'algèbre d'intervalles d'Allen pour la planification collaborative." Electronic Thesis or Diss., Paris, ENSAM, 2014. http://www.theses.fr/2014ENAM0027.
Full textAbstract:
Cette thèse propose une méthodologie de pilotage d'organisations complexes, ens'intéressant à de nouvelles méthodes de planification collaborative et d'optimisation d'interventions en environnements soumis à des rayonnements ionisants. En nous basant sur l'étude d'installations scientifiques et technologiques complexes tels que celles du CERN à Genève (Suisse) et de la GSI à Darmstadt (Allemagne), nous y analysons les besoins et contraintes de planification imposés par les environnements à risques en général, et par lesrayonnements ionisants en particulier. Les implications liées à la collaboration sont ensuite détaillées, et un modèle ontologique d'intervention est proposé afin de sélectionner les méthodes les plus adaptées au problème étudié. La méthode proposée dans cette thèse repose sur des techniques éprouvées en planification de projets ainsi qu'en conception de produits comme la Design Structure Matrix (DSM). Elle introduit en revanche dans ces domaines des méthodes habituellement rencontrées en intelligence artificielle : les algèbres temporelles qualitatives et la propagation des contraintes temporelles, ainsi que la recherche de compromis en cas de conflit. Cette « DSM Collaborative » a été implémentée dans une application prototype testée sur des cas pratiques au CERN et à la GSI, dont le premier est décrit dans l'ultime chapitre de cette thèse. C'est une approche qui place la ressource(essentiellement humaine) et les contraintes temporelles au coeur du processus de planification. Elle met l'accent sur la collaboration entre les différents participants, ainsi que sur la simulation et la comparaison multicritère de multiples scenarii plutôt que sur la recherche d'un unique optimum souvent irréalisable sur le plan pratiqueThis work proposes a methodology to handle complexity in organizations byfocusing on innovative and collaborative planning and scheduling methods dedicated to the optimization of interventions in environments emitting ionizing radiations. By taking as work environment highly complex and technological scientific facilities such as the ones of CERN in Geneva (Switzerland) and GSI in Darmstadt (Germany), we analyze the needs and requirements induced in intervention planning and scheduling by hazardous environments in general, and then more specifically by ionizing radiations. The implications of collaborative work are then scrutinized, and an ontological model for interventions is designed in order to select the methods best suited to our problem. The framework we present in this work relies on methods sucessfully used in project planning and scheduling and innovative product design like the Design Structure Matrix (DSM). It also introduces in these fields methods borrowed to artificial intelligence planning and scheduling such as the temporal qualitative algebras, constraint propagation, and the search of compromises in case of conflicts. This so called “Collaborative DSM” has been implemented in a prototype software application tested at CERN and GSI on practical applications. The very first one and its results are presented in the final chapter of this thesis. This framework aims at placing resources (mostly human resources) and temporal constraints at the heart of the planning and scheduling process. It focuses on collaboration between the different actors involved, from coordinators to technicians, and on simulation and multiple-criteria comparison of several scenarios, rather than searching for a unique optimum, which often tends to be non-practical, should one even be found
11
Helgesson, Fredrik. "Analysis of a flight mechanics simulator." Thesis, KTH, Flygdynamik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-265616.
Full textAbstract:
Aircraft design is an act of art requiring dedication and careful work to ensure good results. An essential tool in that work is a flight mechanics simulator. Such simulators are often built up of modules/models that are executed in a sequential order in each time iteration. This project aims to analyze potential improvements to the model execution order based on the dependency structure of one such simulator. The analysis method Design Structure Matrix (DSM), was used to define/map the dependencies and then Binary Linear Programming (BLP) was utilized to find five new potentially improved model orders to minimize the number of feedbacks from one iteration to the next one. Those five proposed execution orders were next compared and evaluated. The result is a model order that reduce the number of models receiving feedbacks from the previous iteration from 13 to 6, with insignificant changes in the precision of the simulator.Vid flygplanskonstruktion krävs hårt och noggrant arbete för att säkerställa gott resultat. Ett oumbärligt verktyg är då en flygmekanisk simulator. Den typen av simulatorer är ofta uppbyggda av moduler/modeller som exekveras i en bestämd sekventiellt ordning i varje tidsteg. Syftet med detta projekt är att undersöka möjliga förbättringar av exekverings ordningen av de olika modellerna i en existerande simulator, baserat på beroendestrukturen. Analysmetoden Design Structure Matrix (DSM) användes för att bestämma beroendestrukturen och sedan utnyttjades Binär Linjär Programmering (BLP) för att hitta fem förbättrade modellordningar med avseende på att minimera antalet modeller som erhåller indata från föregående tidsiteration. De fem förbättringsförslagen jämfördes och utvärderades. Resultatet är en modellordning som kan minska antalet återkopplande modeller från 13 till 6, med insignifikanta skillnader i precisionen av simulatorn.
12
Brattlöw, Johan, and Adam Forsberg. "Värdeflödesanalys : ett första steg mot lean produktutveckling." Thesis, Linköping University, Department of Management and Economics, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-2746.
Full textAbstract:
Detta examensarbete har utförts vid Ekonomiska institutionen på Linköpings tekniska högskola. Uppdragsgivare har varit Kongsberg Automotive AB och Saab Training Systems AB. Syftet med detta arbete har varit att undersöka om värdeflödesanalys inom produktutveckling kan hjälpa företag att effektivisera utvecklingen av produkter. Metoden för värdeflödesanalys som vi valt att prova har tagits fram av MIT. Arbetets syfte var att pröva denna metod, detta gjordes genom att utföra två studier. Modellen föreskriver att en kartläggning görs i tre steg: först genom ett ganttschema, därefter flödesschema och till sist en DSM. Datainsamlingen är gjord med hjälp av intervjuer och en enkät, enligt Millards rekommendation. Med hjälp av metoden och stöd av litteratur kartlades och analyserades flödet. Bland annat framkom följande åtgärdsförslag: Tydligare ansvarsområden och klara rutiner Utför FEM-beräkning mer parallellt med konstruktionsarbetet Tydligarepull event för att klargöra varje aktivitets syfte. Vi kan konstatera att resultaten av värdeflödesanalysen har tagits väl emot av företagen, både när det gäller kartläggning och åtgärdsförslag. Detta leder oss fram till vår slutsats att modellen har varit till hjälp för företagen och därmed får anses fungera.
13
Svensson, Jonas, Karl-Linus Blomberg, and Joakim Eriksson. "Mapping of relations and dependencies using DSM/DMM-analysis : Casting mold manufacturing at Husqvarna." Thesis, Jönköping University, JIBS, Business Administration, 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-256.
Full textAbstract:
Husqvarna is a Swedish company producing products for forestry, park and gardens. Due to harder competition they wish to increase efficacy in production. This can be achieved by shorter lead-times in the complex process of making casting molds. Activities within this process have certain relations and dependencies between each other that can be analyzed by using a Dependence Structure Matrix. The Dependence Structure Matrix is a tool that can improve efficiency by rearranging activities according to how they are dependent of each other.
The purpose is to make a Dependence Structure Matrix of activities that Husqvarna can use to analyze dependencies within the process of cast molding. The DSM Matrix will propose restructured activities of the process which can be evaluated to determine if greater efficacy can be reached.
To determine the activities within the process of making cast molds a workshop at Husqvarna for the people involved was conducted. A matrix has been constructed based on the information of activities and their dependencies. This information has then been analyzed by the software Multiplan.
The process of making casting molds could be analyzed by the DSM/DMM approach. A new order of how to carry out activities is the outcome of the analysis. The result can be analyzed by Husqvarna in order to determine if greater efficacy can be reached.
14
Alenin, Andrey S. "Matrix structure for information-driven polarimeter design." Thesis, The University of Arizona, 2015. http://pqdtopen.proquest.com/#viewpdf?dispub=3700194.
Full textAbstract:
Estimating the polarization of light has been shown to have merit in a wide variety of applications between UV and LWIR wavelengths. These tasks include target identification, estimation of atmospheric aerosol properties, biomedical and other applications. In all of these applications, polarization sensing has been shown to assist in discrimination ability; however, due to the nature of many phenomena, it is difficult to add polarization sensing everywhere. The goal of this dissertation is to decrease the associated penalties of using polarimetry, and thereby broaden its applicability to other areas.
First, the class of channeled polarimeter systems is generalized to relate the Fourier domains of applied modulations to the resulting information channels. The quality of reconstruction is maximized by virtue of using linear system manipulations rather than arithmetic derived by hand, while revealing system properties that allow for immediate performance estimation. Besides identifying optimal systems in terms of equally weighted variance (EWV), a way to redistribute the error between all the information channels is presented. The result of this development often leads to superficial changes that can improve signal-to-noise-ration (SNR) by up to a factor of three compared to existing designs in the literature.
Second, the class of partial Mueller maitrx polarimeters (pMMPs) is inspected in regards to their capacity to match the level of discrimination performance achieved by full systems. The concepts of structured decomposition and the reconstructables matrix are developed to provide insight into Mueller subspace coverage of pMMPs, while yielding a pMMP basis that allows the formation of ten classes of pMMP systems. A method for evaluating such systems while considering a multi-objective optimization of noise resilience and space coverage is provided. An example is presented for which the number of measurements was reduced to half.
Third, the novel developments intended for channeled and partial systems are combined to form a previously undiscussed class of channeled partial Mueller matrix polarimeters (c-pMMPs). These systems leverage the gained understanding in manipulating the structure of the measurement to design modulations such that the desired pieces of information are mapped into channels with favorable reconstruction characteristics.
15
Bagley, Matthew R. 1966. "Modeling an automobile steering system using Axiomatic Design's Design Matrix and the Design Structure Matrix." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/34823.
Full textAbstract:
Thesis (S.M.)--Massachusetts Institute of Technology, System Design & Management Program, 2005.Includes bibliographical references (p. 128-129).
The automobile steering system can be thought of as a system within a system. The steering system has clear functions and requirements as well as many interrelated components and subsystems including the front tires, wheels, front suspension, steering gear, intermediate shaft, column and steering wheel. System decomposition is an important aspect of this system analysis. The scope of this thesis is the steering system and steering attributes of a particular new model program code named UXXX. An important element of this research is a case study where an error state called Nibble was discovered late in the program. The attempted resolution of the concern caused much turmoil and drove higher component costs, engineering costs, launch delays, warranty costs and decreased customer satisfaction. The main objective of this work was to execute good system analysis to understand key interactions within the system and to provide documentation and knowledge transfer of key discoveries. A requirement based Design Structure Matrix (DSM) was used as the primary methodology for system analysis. In order to construct the DSMs, Axiomatic Design's Design Matrix (DM) was used to develop Functional Requirements (FRs) and Design Parameters (DPs). The requirements based DSM was derived from the DM. DSMs were created from requirements based interactions, spatial interactions and Nibble relationships (Design Parameters influencing Nibble). Herein outlines an approach for synthesizing functional requirements to create a quality Design Matrix and then transform into a DSM. One key discovery is in the development of FRs using a left-to-right and then a right-to-left approach followed by synthesis. Another important development is a matrix comparison
(cont.) method where matrices of different types of interactions are compared through matrix addition. Discussion of key questions from the case are presented as well as conclusions, recommendations and proposed future work.
by Matthew R. Bagley.
S.M.
16
Bonjour, Eric. "Contributions à l'instrumentation du métier d'architecte système : de l'architecture modulaire du produit à l'organisation du système de conception." Habilitation à diriger des recherches, Université de Franche-Comté, 2008. http://tel.archives-ouvertes.fr/tel-00348034.
Full textAbstract:
Ce mémoire constitue une synthèse de nos activités de recherche, d'animation scientifique, d'enseignement et de responsabilité pédagogique entre 1998 et 2008. Depuis une dizaine d'années, les concepteurs de systèmes mécatroniques doivent satisfaire des exigences de plus en plus sévères et nombreuses. Pour cela, ils doivent créer des solutions qui tendent à se complexifier, pour porter de multiples fonctions de service ou intégrer les dernières technologies innovantes. La conception d'un système mécatronique passe par la conception architecturale qui réalise l'identification de l'architecture du système. Cette activité requiert l'implication d'un métier émergent et stratégique : l' "architecte système". En même temps que l'ingénierie technique, l'architecte système doit assurer l'ingénierie organisationnelle de la conception, c'est-à-dire, définir une organisation adéquate du système de conception. Ce double rôle est critique lors de la phase de conception préliminaire, car les décisions prises auront un impact fort sur les performances de l'ensemble du projet.
La finalité de nos travaux est de développer des modèles, méthodes et outils d'aide à la décision permettant de supporter les activités à la fois technique et organisationnelle d'un architecte système. L'originalité majeure de notre projet réside dans le couplage que nous recherchons entre les architectures du système-produit, du système-projet et du système de compétences de conception.
Nous avons structuré nos contributions selon trois thématiques et répondu aux questions suivantes :
T1 - Identification d'une architecture modulaire du produit : comment identifier une architecture modulaire ? Comment modéliser l'architecture d'une famille de produits et générer la diversité ?
T2 - Organisation du système de conception : comment constituer des équipes compétentes ? Comment piloter les systèmes de compétences ?
T3 - Co-conception des architectures produit-projet : Comment propager des évolutions des modules du produit vers l'organisation du système de conception ? Comment coupler l'architecture du produit et l'organisation du système de conception ?
Des perspectives sont proposées propres aux deux thématiques majeures de notre projet (T1 et T2), ainsi que quatre extensions possibles :
1) Vers une conception collaborative consciente,
2) Vers une performance durable du système de conception,
3) Vers un système agile de systèmes de conception,
4) Vers une conception intégrée de systèmes micro-mécatroniques.
17
McGill, Eric Andrew. "Optimizing the closures development process using the design structure matrix." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/34858.
Full textAbstract:
Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; and, (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division; in conjunction with the Leaders for Manufacturing Program at MIT, 2005.Includes bibliographical references (p. 132-133).
Product development processes are inherently complex sets of activities that involve a vast number of connections between participants. Engineers, designers, marketers, financial analysts, and manufacturers all have to receive information, process it, and distribute their decisions back into the system. These paths create information loops that are hidden from the participants on a long time scale and generate non-linear feedback. An analysis of the closures product and process development tasks at a major US automaker prompted the creation of new tools to optimize the ordering, identification of coupled blocks, prioritization of interactions, allocation of resources, and modeling of multiple projects. Ultimately, the analysis predicted a reduction in the average completion time of [approx.] 80%, a reduction in standard deviation of [approx.] 95%, and potential savings of -[approx.] $5B. Unfortunately, many of the suggestions from the analysis run headlong into the organization's structural, political, and cultural environment. Structurally, the automaker is a matrix organization split along functions and program lines, constantly attempting to balance between being a strong component designer and a quality assembler. However, the functional divisions create trouble in viewing and communicating across the entire system, whether that system is the vehicle to be designed or the organization itself. Politically, the atmosphere is dominated by a strong functional orientation, authoritative traditions, and a rigid hierarchy. Culturally, the people seem to be jaded and somewhat fatalistic about the company's future.
(cont.) Managing change in this environment requires effort from the top and bottom of the organization, and must draw on those people inside the organization that can provide an outsider's perspective when addressing both the macro and micro challenges that will appear. Success will require using the organization against itself in order to create the initial changes that will ultimately bring about a long-term turnaround.
by Eric Andrew McGill.
S.M.
M.B.A.
18
Moccio, Craig Angelo. "Using Datum Flow Chain and Design Structure Matrix to manage team structure and integration." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/91762.
Full text
19
Zambito, Antonino Paolo 1970. "Using the design structure matrix to streamline automotive hood system development." Thesis, Massachusetts Institute of Technology, 2000. http://hdl.handle.net/1721.1/29159.
Full textAbstract:
Thesis (S.M.)--Massachusetts Institute of Technology, System Design & Management Program, 2000.Includes bibliographical references (leaf 80).
This thesis applies the design structure matrix (DSM) methodology to streamline the automotive hood subsystem development process, addressing the development phases from upstream product strategies to manufacture and assembly. In this analysis, a two-dimensional index called task volatility is used to describe the level of dependency and probability of rework between two tasks. Task volatility is the product of two independent dependency attributes: task sensitivity and information variability. In addition to these dependency data, the models integrate initial costs and durations as well as those associated with rework. This thesis also discusses the concepts of process flexibility and process reliability, and how these attributes can be used together to optimize the product development process. It proposes that iteration is a tradeoff between these attributes, suggesting that optimal process performance can be achieved with a hybrid (reliable / flexible) process. The analysis begins with a baseline process model that describes the current development process. This model is correlated to the actual process by adjusting rework probabilities until the appropriate process duration is obtained. The baseline process model is progressively streamlined through the use of traditional DSM techniques such as task sorting and partitioning. Finally, the baseline model is restructured in the last phase of this analysis using a strategy that leverages currently available technologies to decrease cycle time and rework cost. The refined models are simulated at each step of the analysis. The simulation results are compared to preceding models in order to arrive at a recommended process.
by Antonino Paolo Zambito.
S.M.
20
Nebiyeloul-Kifle, Yonas 1964. "Application of the Design Structure Matrix to integrated product development process." Thesis, Massachusetts Institute of Technology, 2005. http://hdl.handle.net/1721.1/33664.
Full textAbstract:
Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management, 2005.Includes bibliographical references (leaves 39-40).
A challenging aspect of managing complex product development process is the ability to account for iterations, which are inherent in the design process. A leading edge approach to account for iterations in development process is Design Structure Matrix (DSM). This thesis presents an application of DSM methodology to the project planning and management phase of an integrated product development process. The thesis starts by introducing the project management and planning phase of Raytheon's integrated product development process. It presents the DSM methodology applied to construct the baseline DSM model including the analysis performed. The thesis then describes the characterizations performed to augment the DSM capability to study the information exchange dynamics. To capture the hierarchical structure of the integrated product development process, the thesis employed a hierarchical DSM analysis tool, Arch. An improved process architecture is thus developed by applying DSM partitioning analysis. Finally, the thesis concludes by presenting the improvements gained and the proposed process for the project management and planning phase.
by Yonas Nebiyeloul-Kifle.
M.B.A.
21
Dong, Qi 1973. "Representing information flow and knowledge management in product design using the design structure matrix." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/9391.
Full text
22
Rosengren, Hellman Jonas. "Modular Battery Base Unit : A Method-Based Design Approach." Thesis, KTH, Maskinkonstruktion (Inst.), 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-183421.
Full textAbstract:
This thesis covers a product development process carried out in collaboration with Ericsson –Enclosure & Power and their development of Radio Base Stations (RBS). As Ericsson expands into new markets, the different customer demands on their support systems increases in number and variation. In order to improve their business structure and still provide a wide array of product solutions, they are currently developing a new modular product family. Today numerous methods for product modularization exist, but there is a lack of experience of using such methods at Ericsson – Enclosure & Power. This thesis is an exploration of what methods could be suitable to use in this context, and how to implement them in a beneficial way. The object of study is the Battery Base Unit (BBU), a mounting base for RBS cabinets that contains a compartment for backup batteries. A methodology is suggested for developing this product in a way that secures a proper modular structure. Part of the methodology consists of standard product development methods such as Quality Function Deployment (QFD), concept selection and prototyping. The other part consist of the modularization methods Function Structure Heuristics and Design Structure Matrix (DSM), that are employed first on functional level before developing concepts and secondly on component-based level while detailing the final concept. The thesis describes how these implementations have been made, how the product have been developed from idea to prototype and the resulting product modularity. The final design is evaluated against the product specification and the benefits and drawbacks of using a formalized modularization process for product development at Ericsson – Enclosure & Power are discussed.Detta arbete handlar om den produktutveckling som utförts i samarbete med Ericsson –Enclosure & Power och deras utveckling av kabinett för radiobasstationer (RBS). Ericssons expansion på nya marknader ökar mängden krav på deras olika supportsystem. För att kunna vidareutveckla sin verksamhet och samtidigt erbjuda ett stort antal produktlösningar utvecklar de för närvarande en ny modulbaserad produktfamilj. Idag finns ett flertal metoder för produktmodularisering men man saknar erfarenhet av att arbeta med sådana metoder på Ericsson– Enclosure & Power. Detta arbete undersöker vilka metoder som är lämpliga att använda i detta sammanhang, och hur man på bästa sätt ska implementera dem. Objektet för denna studie är Batteribasenheten (BBUn) som är ett fundament för montering av RBS kabinettet med ett utrymme för reservbatterier. Ett övergripande tillvägagångssätt föreslås för att säkerställa att utvecklingen av denna produkt inkluderar en bra modulär uppbyggnad. Delvis består tillvägagångssättet av vanliga produktutvecklingsmetoder såsom Quality Function Deployment (QFD), koncepturval och prototyper. I övrigt består det i modulariseringsmetoderna Function Structure Heuristics och Design Structure Matrix (DSM) som används först på funktionsnivå innan konceptgenereringsfasen och därefter på komponentnivå under detaljutvecklingen av det slutliga konceptet. Detta arbete beskriver hur dessa metoder har implementerats, hur produktenhar utvecklats från idé till prototyp samt den resulterande produktmodulariteten. Den slutliga utformningen utvärderas mot den angivna kravspecificeringen och fördelarna och nackdelarna med att använda en formaliserad metod för produktutveckling på Ericsson – Enclosure & Power diskuteras.
23
Gardiner, Eric. "The design of non-orthogonal experiments with a factorial treatment structure." Thesis, University of Reading, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.280904.
Full text
24
Tedrick, Benjamin James. "Utilization of the Design Structure Matrix to Facilitate Prototype Planning and Product Development." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1523629087144184.
Full text
25
Krüger, Peter [Verfasser]. "Qualitätsorientiertes Konstruieren von IT-Infrastrukturen : Ein Design Structure Matrix basierter Ansatz / Peter Krüger." Aachen : Shaker, 2014. http://d-nb.info/1063265118/34.
Full text
26
Rinkevich, Daniel J. (Daniel Joseph) 1960, and Frederick P. 1965 Samson. "An improved powertrain attributes development process with the use of design structure matrix." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/34736.
Full textAbstract:
Thesis (S.M.)--Massachusetts Institute of Technology, System Design & Management Program, 2004.Includes bibliographical references (p. 131).
Automobiles are becoming increasingly complicated and are creating more of a challenge for the engineering teams working on them. This thesis focuses on improving the methods of managing powertrain attributes and the interactions between them. We are concentrating on the particular attributes of Shift Quality, Performance Feel, Driveability, and Trailer Towing. Engineering work to achieve specific attributes is currently handled attribute by attribute and the system is brought together later. This lack of a more holistic view results in a large amount of engineering rework as attributes are balanced. Reducing or eliminating this rework is the goal. A Design Structure Matrix (DSM) was used to document interactions between the powertrain attributes, sub-attributes and design parameters. Research on various reporting formats was done to determine the best method to communicate the interactions. DSM experts were interviewed about the benefits and pitfalls of using a DSM for reference. Several surveys were done to determine engineering's familiarity with various methods of displaying system interactions and their preferences for reporting the interactions. We also compared the interactions to existing CAE capability to determine the current state of attributes management. The DSM showed numerous interactions between powertrain attributes, other vehicle attributes and design parameters. The analysis of existing CAE tools showed a significant percentage of interactions are not currently being modeled. The responses to survey questions on output methods indicated that a DSM, while being an excellent tool for capturing the interactions, might not be the best tool for displaying the interactions to engineers. The surveys revealed that
(cont.) engineers are looking for more information than a DSM or any systems interactions model contain, such as probability that an interaction exists, expected direction and levels of the interaction, and quick and simple methods for better understanding of these potential interactions. This desired level of detail highlights the need to share Lessons Learned, develop a corporate knowledge base and develop best practices. A review of the organizational structure and engineering focus indicated that increased focus is needed on powertrain attributes to better match customer expectations. Additionally, organizational structure changes are recommended to increase visibility of powertrain attributes.
by Daniel J. Rinkevich [and] Frederick P. Samson.
S.M.
27
Zhang, Yifeng S. M. Massachusetts Institute of Technology. "A simulation-based resource optimization and time reduction model using design structure matrix." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/45284.
Full textAbstract:
Thesis (S.M.)--Massachusetts Institute of Technology, Computation for Design and Optimization Program, 2008.Includes bibliographical references (p. 87-89).
Project scheduling is an important research and application area in engineering management. Recent research in this area addresses resource constraints as well as stochastic durations. This thesis presents a simulation-based optimization model for solving resource-constrained product development project scheduling problems. The model uses design structure matrix (DSM) to represent the information exchange among various tasks of a project. Instead of a simple binary precedence relationship, DSM is able to quantify the extent of interactions as well. In particular, these interactions are characterized by rework probabilities, rework impacts and learning. As a result, modeling based on DSM allows iterations to take place. This stochastic characteristic is not well addressed in earlier literatures of project scheduling problems. Adding resource factors to DSM simulation is a relatively new topic. We not only model the constraints posed by resource requirements, but also explore the effect of allocating different amount of resources on iterations. Genetic algorithm (GA) is chosen to optimize the model over a weighted sum of a set of heuristics. GA is known for its robustness in solving many types of problems. While the normal branch-and-bound method depends on problem specific information to generate tight bounds, GA requires virtually no information of the search space. Therefore GA makes this simulation- optimization model more general. Results are shown for several fictitious examples, each having some uniqueness in their DSM structure. Managerial insights are derived from the comparison of the GA solutions to these examples with other known solutions.
by Yifeng Zhang.
S.M.
28
Welch, Cory J. 1972. "Application of the design structure matrix : a case study in process improvement dynamics." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/84519.
Full textAbstract:
Thesis (M.B.A.)--Massachusetts Institute of Technology, Sloan School of Management; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering; in conjunction with the Leaders for Manufacturing Program at MIT, 2001.Includes bibliographical references (p. 88).
by Cory J. Welsh.
S.M.
M.B.A.
29
Corby, Robert J. "Using the design structure matrix and systems thinking to develop a requirements driven automotive closures design process." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/43172.
Full textAbstract:
Thesis (S.M.)--Massachusetts Institute of Technology, System Design and Management Program, February 2008.Includes bibliographical references (p. 93).
Thesis Outline and Flow: Chapter 1. We begin by first reviewing the predominant industry and company dynamics driving the automotive industry today. We establish the need for shorter product development cycles as well as the need to create products to specifications. A review of relevant prior work is also presented to show where others have worked in this space. The problem statement and motivation for this work evolves subsequently. Chapter 2. We discuss product development activities as they relate to automotive development. We present automotive product development in the context of the system's engineering system-V. We also review the significant role of the virtual development process that is key to modern product development and why we must consider more than just geometric compatibility when evaluating designs for completeness. Chapter 3. Introduces the reader to automotive closures, specifically to side doors. A broad review is completed to facilitate the reader's understanding of subsequent chapters. Also, a view of how requirements are created and a description of the predominant requirements in automotive closures is included. Chapter 4. We get to the more technical and analytical section of this thesis. We begin with an overview of the design structure matrix and then explain the process used to create the case study DSM. We also discuss the art of architecting a DSM so it may be used as a very effective corporate knowledge base. Chapter 5. Represents the closures created DSM and the real world application of the requirements integrated design process. We present the DSM created for this thesis and discuss the nature of its content and then its structure. Chapter 6. Runs a Monte Carlo simulation on the As-Is DSM to create a benchmark. The average process completion time and standard deviation resulting from this simulation are used to measure the effectiveness of process improvement proposals. We discuss a number of the process improvements suggested by Auto OEM's subject matter experts (SMEs). These improvements are then incorporated into the simulation. Conclusions from our research are summarized. Chapter 7. Reflecting on this work completed in this research, chapter 7 shares practical insights gained during this research. Chapter 7 ends with suggestions on what future work may completed.7102 System Design and Management Program.
by Robert J. Corby.
S.M.
30
Sequeira, Michele W. (Michele Wanda). "Use of the design structure matrix in the improvement of an automobile development process." Thesis, Massachusetts Institute of Technology, 1991. http://hdl.handle.net/1721.1/13484.
Full textAbstract:
Thesis (M.S.)--Massachusetts Institute of Technology, Dept. of Materials Science and Engineering, and Massachusetts Institute of Technology, Sloan School of Management, 1991.Includes bibliographical references (leaves 67-68)
by Michele W. Sequeira.
M.S.
31
Markhan, David C. (David Charles) 1952. "Applying the design structure matrix and critical chain methodologies to a technology-development project." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/29153.
Full textAbstract:
Thesis (S.M.)--Massachusetts Institute of Technology, System Design & Management Program, 1999.Includes bibliographical references (p. 65).
In today's global economy, enterprises must develop higher-quality products at -an ever-increasing pace to remain competitive. This need drives project managers to seek new ways to organize and manage their development projects. Two means by which the cycle time of projects may be reduced are the Design Structure Matrix and Critical Chain methodologies. The Design Structure Matrix is a representation that makes explicit the dependencies between project tasks and in so doing clarifies how the tasks may be sequenced to avoid unnecessary, time-wasting iterations. The Critical Chain is a project-scheduling and -management methodology that recognizes that each project task is subject to uncertainty and accommodates that uncertainty in a way that protects the completion date of the project and hence minimizes its duration. While application of these techniques individually to product-development . projects has been reported in the literature, there are no reports of their application either together or to technology-development projects. That they have not been applied together is surprising, because the two methods complement each other. That they have not been applied to technology-development projects is surprising, too, because such projects have many similarities to product-development projects, and the same modern needs for cycle-time reduction. Accordingly, this thesis examines the feasibility of the application of the Design Structure Matrix and Critical Chain methodologies together to a technology-development project. The project is a four-month-long subproject of a magnetic-recording technology-development project, involving five people from two different organizations in the same company and an extern.al supplier. The major finding of the thesis work is that it is feasible to apply the two techniques together to a technology-development project-but to do so requires a high level of flexibility on the part of the Project Manager. Additional findings include guidelines for: creating the Design Structure Matrix as a team; choosing team members on the basis of their ability to implement the Critical Chain principles; and dealing with the constant flux in the task list that is inherent in technology development.
by David C. Markham.
S.M.
32
Brady, Timothy Kevin 1960. "Utilization of dependency structure matrix analysis to assess implementation of NASA's complex technical projects." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/82693.
Full textAbstract:
Thesis (S.M.)--Massachusetts Institute of Technology, System Design & Management Program, 2002.This electronic version was submitted by the student author. The certified thesis is available in the Institute Archives and Special Collections.
Includes bibliographical references (leaves 93-96).
by Timothy K. Brady.
S.M.
33
Lavine, Jerrold I. (Jerrold Isaac) 1968. "Parametric design constraints management using the design structure matrix : creation of an electronic catalog for a safety belt system." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/88826.
Full text
34
Sharman, David M. (David Maynard) 1966. "Valuing architecture for strategic purposes : comments on applying the dependency structure matrix with real options theory." Thesis, Massachusetts Institute of Technology, 2002. http://hdl.handle.net/1721.1/43617.
Full textAbstract:
Thesis (S.M.)--Massachusetts Institute of Technology, System Design & Management Program, 2002.Also issued in leaves.
Includes bibliographical references (p. 232-236).
Analysis of product and organisational architecture using dependency structure matrices to describe a series of domains, in conjunction with real options theory, assists in predicting the strategic capabilities of either existing or potential products and organisations, and likely optimal or maximal rates of change. This assists in predicting the extent to which technologically dependent organisations can realistically create and capture value from a portfolio approach as a number of technology conglomerates currently seek to do. It also goes some way towards explaining why existing organisations find it difficult to create or exploit new knowledge and thereby helps explain why many synergies remain unrealised. This suggests that strategic leadership of technology conglomerates must be by people who possess either the tacit knowledge of the financial, organisational and technical aspects of the business, or who possess explicit tools to bridge any gaps. Given that explicit financial tools are available, in the absence of unique individuals the strategic planning process needs to incorporate measures designed to a priori check that the proposed strategies will result in technical knowledge creation and organisational value capture.
by David M. Sharman.
S.M.
35
Mazur, Lukasz Maciej. "Project Task: Member Assignment Using Design Structure Matrix and Genetic Algorithm in Concurrent Engineering Project Management." Thesis, Montana State University, 2005. http://etd.lib.montana.edu/etd/2005/mazur/MazurL0505.pdf.
Full textAbstract:
In concurrent engineering, project tasks generally require the establishment of multifunctional teams to simultaneously consider various activities throughout the entire product life cycle. Team members from different functional departments of the company interact in every phase of development activities to design products and processes concurrently. This concurrent strategy increases the complexity of product development and design processes and makes teams difficult to organize. Without effective task coordination and team organization, the lack of communication and cooperation among team members in a large group of tasks could seriously delay the project completion. This research provides an integrated solution to overcome these difficulties. This research aims to model both project tasks and team members for the task-member assignments. To accomplish this, we develop an integrated framework that includes three major components: a project task model, a team member model and a task-member assignment model. The project task model optimizes the complex task structure using a Genetic Algorithm (GA), while Design Structure Matrix (DSM) identifies the three major project task types: independent, dependent, and interdependent. The team member model provides a quantitative representation for three important team member characteristics, namely functional knowledge, teamwork capability and working relationship. Analytic Hierarchy Process (AHP) and personality profiling using Myers-Briggs Type Indicator (MBTI) are used to obtain ratings of team member characteristics. According to the project task structure, quantified team member characteristics, and each member\'s workload schedule, the task-member assignment model accomplishes the ultimate goal of this research - assigning the right team members to the right tasks at the right time. The effectiveness of the developed methodology is demonstrated by an illustrative example.
36
Grun, Eli (Eli Paul). "An application of design structure matrix methods to explore process improvements in aircraft fight line operations." Thesis, Massachusetts Institute of Technology, 2016. http://hdl.handle.net/1721.1/106246.
Full textAbstract:
Thesis: S.M. in Engineering and Management, Massachusetts Institute of Technology, School of Engineering, System Design and Management Program, Engineering and Management Program, 2016.Cataloged from PDF version of thesis.
Includes bibliographical references (pages 45-47).
The complexities around building, testing, and flying aircraft span many different domains. Some of these domains include processes, people, and tools, of which affect the way work is performed on aircraft. In this thesis, communication tools and the organizations involved in troubleshooting and readying aircraft for flight at an aircraft manufacturer's flight line was analyzed using Design Structure Matrix (DSM) methods. Mapping the two DSMs together into a larger multi-domain matrix (MDM) provided insight to the ways information is transferred, and clarified ways to streamline available information to the various stakeholders, while reducing effort and increasing information quality. One recommendation to streamline flows was to design a system that leverages existing responsibilities of Manufacturing, Quality and Engineering and applying them in an electronic format by utilizing computers (a tool found at every level of employee) to capture live data in an organic fashion. The proposed solution would provide valuable information to other stakeholders at a reduced effort, translating to savings. Savings in the form of interaction reductions could range from 235 to 117, at a 50% reduction in interactions across all organizations. It would also provide a method by which to share information at faster speeds, ensuring all stakeholders are engaged with the latest information. Information quality and speed would further help reduce the risk of flight delays, and improve the customer experience. Overall, reductions in efforts from all organizations and an improved customer experience through rapid and accurate information dissemination, will ultimately reduce cost and promote business and growth.
by Eli Grun.
S.M. in Engineering and Management
37
Cho, Soo-Haeng 1975. "An integrated method for managing complex engineering projects using the design structure matrix and advanced simulation." Thesis, Massachusetts Institute of Technology, 2001. http://hdl.handle.net/1721.1/8607.
Full textAbstract:
Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2001.Includes bibliographical references (p. 101-104).
This thesis proposes an integrated project management framework for complex engineering projects such as the development of an automobile. The integrated method streamlines project planning and control using three modules: structuring, modeling, and scheduling. In the structuring module, the design structure matrix (DSM) method is used to structure the information flows among tasks and capture the iteration loops. By classifying various types of information dependencies, a critical dependency path is identified and redundant constraints are removed for the modeling and scheduling analyses. In the modeling module, a generalized process model predicts complex behaviors of iterative processes using advanced simulation techniques such as the Latin Hypercube Sampling and parallel discrete event simulation. The model computes the probability distribution of lead time and identifies critical paths in a resource-constrained, iterative project. Using the results of analyses from the structuring and modeling modules, a network-based schedule in the form of a PERT or Gantt chart is developed in the scheduling module. The schedule is used as the basis for monitoring and control of the project. The primary goal of this work is to develop an integrated method that guides project management efforts by improving the effectiveness and predictability of complex processes. The method can also be used for identifying leverage points for process improvements and evaluating alternative planning and execution strategies. Better project management will ultimately result in a better quality product with timely delivery to customers. Two case studies are performed to illustrate the utility of the method.
by Soo-Haeng Cho.
S.M.
38
Bartolomei, Jason E. "Qualitative knowledge construction for engineering systems : extending the design structure matrix methodology in scope and procedure." Thesis, Massachusetts Institute of Technology, 2007. http://hdl.handle.net/1721.1/43855.
Full textAbstract:
Thesis (Ph. D.)--Massachusetts Institute of Technology, Engineering Systems Division, 2007.MIT Barker Engineering Library copy: printed in pages.
Also issued printed in pages.
Includes bibliographical references (leaves 141-146).
This thesis presents a new modeling framework and research methodology for the study of engineering systems. The thesis begins with a formal conceptualization of Engineering Systems based upon a synthesis of various literatures. Using this conceptualization, a new modeling framework is presented called the Engineering Systems Matrix (ESM). The ESM is an improvement to existing system-level modeling frameworks, such as the Design Structure Matrix (DSM), by providing a dynamic, end-to-end representation of an engineering system. In support of this contribution, a new research methodology is presented called Qualitative Knowledge Construction (QKC). QKC can be thought of as a Bayesian-type approach to grounded theory. The methodology integrates qualitative social science with quantitative methods by developing a procedure for translating textual reports of observations, interview transcripts, system documentation, and figures into coded data represented in the ESM. The thesis develops the ESM framework and the QKC methodology in the context of a real world engineering system, a US Air Force miniature uninhabited air vehicle (MAV) product development system.
by Jason E. Bartolomei.
Ph.D.
39
Gärtner, Thomas [Verfasser]. "Simulationsmodell für das Projekt- und Änderungsmanagement in der Automobilentwicklung auf Basis der Design Structure Matrix / Thomas Gärtner." Aachen : Shaker, 2011. http://d-nb.info/1071529323/34.
Full text
40
Balachandran, Libish Kalathil. "Computational workflow management for conceptual design of complex systems : an air-vehicle design perspective." Thesis, Cranfield University, 2007. http://dspace.lib.cranfield.ac.uk/handle/1826/5070.
Full textAbstract:
The decisions taken during the aircraft conceptual design stage are of paramount
importance since these commit up to eighty percent of the product life cycle costs. Thus
in order to obtain a sound baseline which can then be passed on to the subsequent
design phases, various studies ought to be carried out during this stage. These include
trade-off analysis and multidisciplinary optimisation performed on computational
processes assembled from hundreds of relatively simple mathematical models
describing the underlying physics and other relevant characteristics of the aircraft.
However, the growing complexity of aircraft design in recent years has prompted
engineers to substitute the conventional algebraic equations with compiled software
programs (referred to as models in this thesis) which still retain the mathematical
models, but allow for a controlled expansion and manipulation of the computational
system. This tendency has posed the research question of how to dynamically assemble
and solve a system of non-linear models. In this context, the objective of the present
research has been to develop methods which significantly increase the flexibility and
efficiency with which the designer is able to operate on large scale computational
multidisciplinary systems at the conceptual design stage.
In order to achieve this objective a novel computational process modelling method has
been developed for generating computational plans for a system of non-linear models.
The computational process modelling was subdivided into variable flow modelling,
decomposition and sequencing. A novel method named Incidence Matrix Method
(IMM) was developed for variable flow modelling, which is the process of identifying
the data flow between the models based on a given set of input variables. This method
has the advantage of rapidly producing feasible variable flow models, for a system of
models with multiple outputs. In addition, criteria were derived for choosing the optimal
variable flow model which would lead to faster convergence of the system. Cont/d.
41
Lemmens, Yves Claude Jean. "Modelling and analysis of engineering changes in complex systems." Thesis, Cranfield University, 2007. http://dspace.lib.cranfield.ac.uk/handle/1826/5071.
Full textAbstract:
Complex products are comprised of a large number of tightly integrated components, assemblies and systems resulting in extensive logical and physical interdependences between the constituent parts. Thus a change to one item of a system is highly likely to lead to a change to another item, which in turn can propagate further. The aim of this research therefore is to investigate dependency models that can be used to identify the impact and trace thepropagation of changes in different information domains, such as requirements, physical product architecture or organisation. Cont/d.
42
Kerns, Corey Michael. "Naval Ship Design and Synthesis Model Architecture Using a Model-Based Systems Engineering Approach." Thesis, Virginia Tech, 2011. http://hdl.handle.net/10919/32459.
Full textAbstract:
The Concept and Requirements Exploration process used at Virginia Tech is based on a Multi-Objective Optimization approach that explores the design space to produce a Non-Dominated set of ship design solutions ranked objectively by Cost, Risk, and Effectiveness. Prior research and effort has also been made to leverage the validation and verification of the U.S. Navyâ s ship synthesis design tool, ASSET, into the Virginia Tech Ship Synthesis Model.
This thesis applies Design Structure Matrix theory to analyze and optimize the ASSET synthesis process by reducing or removing the feedback dependencies that require the iterative convergence process. This optimized ASSET synthesis process is used as the basis to develop a new Simplified Ship Synthesis Model (SSSM) using Commercial Off-The-Shelf (COTS) software, ASSET Response Surface Models (RSMs) and simplified parametric equations to build the individual synthesis modules.
The current method of calculating an Overall Measure of Effectiveness (OMOE) used at Virginia Tech is based on expert opinion and pairwise comparison. This thesis researches methods for building a Design Reference Mission (DRM) composed of multiple operational situations (OpSits) required by the shipâ s mission. The DRM is defined using a Model Based Systems Engineering (MBSE) approach and an overall Ship Design System Architecture to define and understand the relationships between various aspects of the ship design. The system architecture includes the DRM and enables the development of Operational Effectiveness Models (OEMs) as an alternative to an expert opinion-based OMOE. The system architecture also provides the means for redefining and optimizing the entire ship design process by capturing the entire process and all related data into a single repository.
This thesis concludes with a preliminary assessment of the utility of these various system engineering tools to the naval ship design process.Master of Science
43
Guivarch, Antoine D. (Antoine David) 1979. "Concurrent process mapping, organizations, project and knowledge management in large-scale product development projects using the Design Structure Matrix method." Thesis, Massachusetts Institute of Technology, 2003. http://hdl.handle.net/1721.1/17582.
Full textAbstract:
Thesis (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division, Technology and Policy Program; and, (S.M.)--Massachusetts Institute of Technology, Dept. of Mechanical Engineering, 2003.Includes bibliographical references (p. 149-152).
Sustainable success in product design and development relies not only on technical expertise and creativity within the company but as crucially, if not more, on an intelligent design of the development process, an appropriate and dynamic management of organizations, a realistic and disciplined project management, and on efficient knowledge generation, conservation and distribution techniques. These non-engineering skills pose serious challenges to companies designing complex systems like airplanes or automobiles. As these systems have gotten tremendously more complex, their design has kept involving more people, from different working cultures inside and outside the company, all within tighter time constraints. Adaptation to this new context of product development has nevertheless often been very slow because of persistent corporate traditions inherited from the past. The purpose of this thesis is to demonstrate that Process Mapping and Improvement, Organizations Management, Project Management and Knowledge Management can be reconciled and performed all at once using the Design Structure Matrix (DSM) Method, enabling large and relatively easy improvements of the design activity's efficiency. The state-of-the-art in each of the four mentioned fields is first reviewed. The methodology used throughout this thesis, the Design Structure Matrix (DSM) is then presented. The DSM method and some issues of knowledge management are illustrated in a short case study conducted in January 2002 at PSA Peugeot-Citroen in Paris, France. The promising unifying benefits of the DSM method are then thoroughly described through a large project that took place in Summer 2002 at Ford Motor Company in Dearborn, Michigan. It exhibits how DSMs can provide permanent system-level knowledge, guide the design practitioner through a complex process that would hardly be understood otherwise, enable a dynamic management of organizations and open opportunities for process improvement and redesign. The lessons learned finally lead to recommendations on the practice of the DSM method as well as product development in general.
by Antoine D. Guivarch.
S.M.
44
Schmidt, Robert. "Designing for adaptability in architecture." Thesis, Loughborough University, 2014. https://dspace.lboro.ac.uk/2134/16211.
Full textAbstract:
The research is framed on the premise that designing buildings that can adapt by accommodating change easier and more cost-effectively provides an effective means to a desired end a more sustainable built environment. In this context, adaptability can be viewed as a means to decrease the amount of new construction (reduce), (re)activate underused or vacant building stock (reuse) and enhance disassembly/ deconstruction of components (reuse, recycle) - prolonging the useful life of buildings (reduce, reuse, recycle). The aim of the research is to gain a holistic overview of the concept of adaptability in the construction industry and provide an improved framework to design for, deploy and implement adaptability. An over-arching research question was posited to guide the inquiry: how can architects understand, communicate, design for and test the concept of adaptability in the context of the design process? The research followed Dubois and Gadde s (2002) systematic combining as an over-arching approach that continuously moves between the empirical world and theoretical models allowing the co-evolution of data collection and theory from the beginning as part of a non-linear process with the objective of matching theory with reality. An initial framework was abducted from a preliminary collection of data from which a set of mixed research methods was deployed to explore adaptability (interviews, building case studies, dependency structural matrices, practitioner surveys and workshop). Emergent from the data is an expanded and revised theory on designing for adaptability consisting of concepts, models and propositions. The models illustrate many of the casual links between the physical design structure of the building (e.g. plan depth, storey height) and the soft contingencies of a messy design/construction/occupation process (e.g. procurement route, funding methods, stakeholder mindsets). In an effort to enhance building adaptability, the abducted propositions suggest a shift in the way the industry values buildings and conducts aspects of the design process and how designer s approach designing for adaptability.
45
Abdo, Nawar. "Modularization and evaluation of vehicle’s electrical system." Thesis, KTH, Maskinkonstruktion (Avd.), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-246325.
Full textAbstract:
Modularization is a strategy used by many companies, to help them provide their customers with a high variety of customized products efficiently. This is done through the customization of different independent modules, which are connected by standardized interfaces that are shared throughoutthe entire module variety. Scania, being one of the large companies that provide modular products, has been successfully improving their modularization concepts for many years, and is one of the most iconic companies when it comes to modularization of buses, trucks and engines. But with the increasing need ofelectronics integrated in the vehicles, it is becoming more and more important to modularize the electrical system. There is currently an existing, modularized, product architecture for the electrical system, and Scania wants to know how well modularized it is, as there is no unified way that indicates what is considered to be the better solution.To analyze the current state of the electrical system, a systematic method of modularization was used, which would help answer three important questions: Are the modules well defined? Is there a way to systematically compare alternative solutions? What criteria are more important to focus on? Since there is no unified way of modularization, many modularization methods have been created, and each one has been optimized for a certain purpose. This project compares three different modularization methods and then uses one of the methods which is deemed to be the preferred method to help provide the answers that the company seeks when investigating the modularity of the electrical system. As the electrical system is very complex, and the project has limited amount of resources, it was decided to choose one of the control units as an example, which was the APS (air processing system). The literature study showed that the most rewarding method to use was the MFD (Module Function Deployment), as it provides more information about the product and what criteria the company should focus on. It was then decided to use the relevant steps in MFD to analyze the state of the APS as an example of how this method works.Modularisering är en strategi som används av många företag, för att hjälpa dem att erbjuda sina kunder en mängd olika anpassade produkter på ett effektivt sätt. Detta görs genom anpassning av olika oberoende moduler, som är kopplade med standardiserade gränssnitt som utnyttjas av alla modulvarianterna. Scania, som är ett av de stora företagen som erbjuder modulariserade produkter, har framgångsrikt förbättrat sina modulariseringskoncept under många år och är ett av de mest ikoniska företagen närdet gäller modularisering av bussar, lastbilar och motorer. Men med det ökande behovet av elektronik integrerad i fordonen blir det allt viktigare att modularisera det elektriska systemet. Det finns för närvarande en befintlig, modulär produktarkitektur för det elektriska systemet, och Scania vill veta hur väl modulariserat det är, eftersom det inte finns något enat sätt som anger vad som anses vara den bättre lösningen. För att analysera det elektriska systemets nuvarande tillstånd, måste en systematisk metod förmodularisering användas, vilket skulle hjälpa till att svara på tre viktiga frågor: Är modulerna väldefinierade? Finns det ett sätt att systematiskt jämföra alternativa lösningar? Vilka kriterier är viktigare att fokusera på? Eftersom det inte finns något enhetligt sätt att modularisera har många modulariseringsmetoder skapats, och var och en har optimerats för ett visst ändamål. I projektet jämförs tre olika modulariseringsmetoder och använder sedan en av de metoder som anses vara den föredragna metoden för att hjälpa till att ge svaren som företaget söker när man undersöker modulariteten hos det elektriska systemet. Eftersom det elektriska systemet är väldigt komplext och projektet har begränsat antal resurser beslutades det att välja en av kontrollenheterna som ett exempel, vilket var APS (luftbehandlingssystem). Litteraturstudien visade att den mest givande metoden att använda var MFD (Module FunctionDeployment), eftersom det ger mer information om produkten och vilka kriterier företaget ska fokusera på. Det bestämdes sedan att använda de relevanta stegen i MFD för att analysera APS tillståndet som ett exempel på hur den här metoden fungerar.
46
Kopp, James Clayton, and Robert S. Kaplan. "The influence of organizational hierarchy and departmental structure on communication : the case of Kaplan and Norton's Balanced scorecard in a matrix organization." Thesis, Massachusetts Institute of Technology, 2010. http://hdl.handle.net/1721.1/59254.
Full textAbstract:
Thesis (S.M. in System Design and Management)--Massachusetts Institute of Technology, Engineering Systems Division, 2010.Cataloged from PDF version of thesis.
Includes bibliographical references (p. 80-81).
A large business requires efficient and effective internal communication among employees to achieve its goals. Dodds, Watts, and Sable (DWS) introduced a communication network model assessing information flow within a business by examining the relative influences of organizational structure, message volatility, and task decomposability on the probability of successful message transmission, but there is no research available that examines this or similar models in the context of a real business. The model predicts optimal message flow in a "Multi-scale" organizational network, a structure which in practice may most resemble a matrix organization. In this study a survey was designed to measure the influence of rank and department on message transfer - particularly the informational attributes of understanding, accuracy, importance, and influenceability - originating from the Balanced Scorecard in a large, matrix-managed aerospace business. The survey data indicated the following results: - Understanding (of the Balanced Scorecard metrics) was significantly influenced by employee rank and exhibited some effects of departmental expertise with certain metrics. - Belief in the accuracy of the metrics correlated highly with Understanding. - Importance rankings of the metric displayed high alignment across both rank and department, an encouraging result for company management. - Influenceability (people's belief they could affect the metric) was heavily influenced by rank and somewhat influenced by department. It also generally exhibited the lowest levels and highest variation when compared to the other attributes. - A deeper analysis comparing the Engineering and Program Office departments revealed consistently better vertical communication for Engineering, and better lateral communication within ranks for Program Office, which may indicate an additional influence of department culture on information flow. When subjected to a DWS interpretation, the survey results provided clues about relative influences of rank and department on message flow and relative values of other DWS model parameters - task decomposability and message traffic volume - could be gleaned from employee comments and post-survey interviews. The study falls short of making absolute characterizations of the DWS attributes, but is able to make inferences regarding the communication of the separate attributes relative to each other. Indeed, one important implication of the work done here to DWS theory is that for different business concerns and for different organizations within the overall company, there are apparently different mappings onto the DWS communication framework. Analysis of the study data for this organization indicates lateral communication may be better than vertical communication for Understanding and Influenceability; Accuracy does not exhibit dominance by either parameter; and Importance is well communicated laterally and vertically. More empirical data on measurable information traffic such as email is needed from different organizations, industries, and national cultures for DWS parameter values to converge upon more absolute values.
by James Clayton Kopp.
S.M.in System Design and Management
47
King, Jacob Michael B. "A Method for Visualizing the Structural Complexity of Organizational Architectures." DigitalCommons@CalPoly, 2021. https://digitalcommons.calpoly.edu/theses/2266.
Full textAbstract:
To achieve a high level of performance and efficiency, contemporary aerospace systems must become increasingly complex. While complexity management traditionally focuses on a product’s components and their interconnectedness, organizational representation in complexity analysis is just as essential. This thesis addresses this organizational aspect of complexity through an Organizational Complexity Metric (OCM) to aid complexity management. The OCM augments Sinha’s structural complexity metric for product architectures into a metric that can be applied to organizations. Utilizing nested numerical design structure matrices (DSMs), a compact visual representation of organizational complexity was developed. Within the nested numerical DSM are existing organizational datasets used to quantify the complexity of both organizational system components and their interfaces. The OCM was applied to a hypothetical system example, as well as an existing aerospace organizational architecture. Through the development of the OCM, this thesis assumed that each dataset was collected in a statistically sufficient manner and has a reasonable correlation to system complexity. This thesis recognizes the lack of complete human representation and aims to provide a platform for expansion. Before a true organizational complexity metric can be applied to real systems, additional human considerations should be considered. These limitations differ from organization to organization and should be taken into consideration before implementation into a working system. The visualization of organizational complexity uses a color gradient to show the relative complexity density of different parts of the organization.
48
Börjesson, Fredrik. "Approaches to Modularity in Product Architecture." Licentiate thesis, KTH, Maskinelement, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-96491.
Full textAbstract:
Modular product architecture is characterized by the existence of standardized interfaces between the physical building blocks. A module is a collection of technical solutions that perform a function, with interfaces selected for company-specific strategic reasons. Approaches to modularity are the structured methods by which modular product architectures are derived. The approaches include Modular Function Deployment (MFD), Design Structure Matrix (DSM), Function Structure Heuristics and many other, including hybrids. The thesis includes a survey of relevant theory and a discussion of four challenges in product architecture research, detailed in the appended papers. One common experience from project work is structured methods such as DSM or MFD often do not yield fully conclusive results. This is usually because the algorithms used to generate modules do not have enough relevant data. Thus, we ask whether it is possible to introduce new data to make the output more conclusive. A case study is used to answer this question. The analysis indicates that with additional properties to capture product geometry, and flow of matter, energy, or information, the output is more conclusive. If product development projects even have an architecture definition phase, very little time is spent actually selecting the most suitable tool. Several academic models are available, but they use incompatible criteria, and do not capture experience-based or subjective criteria we may wish to include. The research question is whether we can define selection criteria objectively using academic models and experience-based criteria. The author gathers criteria from three academic models, adds experience criteria, performs a pairwise comparison of all available criteria and applies a hierarchical cluster analysis, with subsequent interpretation. The resulting evaluation model is tested on five approaches to modularity. Several conclusions are discussed. One is that of the five approaches studied, MFD and DSM have the most complementary sets of strengths and weaknesses, and that hybrids between these two fundamental approaches would be particularly interesting. The majority of all product development tries to improve existing products. A common criticism against all structured approaches to modularity is they work best for existing products. Is this perhaps a misconception? We ask whether MFD and DSM can be used on novel product types at an early phase of product development. MFD and DSM are applied to the hybrid drive train of a Forwarder. The output of the selected approaches is compared and reconciled, indicating that conclusions about a suitable modular architecture can be derived, even when many technical solutions are unknown. Among several conclusions, one is the electronic inverter must support several operating modes that depend on high-level properties of the drive train itself (such as whether regeneration is used). A modular structure for the electronic inverter is proposed. Module generation in MFD is usually done with Hierarchical Cluster Analysis (HCA), where the results are presented in the form of a Dendrogram. Statistical software can generate a Dendrogram in a matter of seconds. For DSM, the situation is different. Most available algorithms require a fair amount of processing time. One popular algorithm, the Idicula-Gutierrez-Thebeau Algorithm (IGTA), requires a total time of a few hours for a problem of medium complexity (about 60 components). The research question is whether IGTA can be improved to execute faster, while maintaining or improving quality of output. Two algorithmic changes together reduce execution time required by a factor of seven to eight in the trials, and improve quality of output by about 15 percent.QC 20120605
49
Khalid, Adeel S. "Development and Implementation of Rotorcraft Preliminary Design Methodology using Multidisciplinary Design Optimization." Diss., Georgia Institute of Technology, 2006. http://hdl.handle.net/1853/14013.
Full textAbstract:
A formal framework is developed and implemented in this research for preliminary rotorcraft design using IPPD methodology. All the technical aspects of design are considered including the vehicle engineering, dynamic analysis, stability and control, aerodynamic performance, propulsion, transmission design, weight and balance, noise analysis and economic analysis. The design loop starts with a detailed analysis of requirements. A baseline is selected and upgrade targets are identified depending on the mission requirements. An Overall Evaluation Criterion (OEC) is developed that is used to measure the goodness of the design or to compare the design with competitors. The requirements analysis and baseline upgrade targets lead to the initial sizing and performance estimation of the new design. The digital information is then passed to disciplinary experts. This is where the detailed disciplinary analyses are performed. Information is transferred from one discipline to another as the design loop is iterated. To coordinate all the disciplines in the product development cycle, Multidisciplinary Design Optimization (MDO) techniques e.g. All At Once (AAO) and Collaborative Optimization (CO) are suggested. The methodology is implemented on a Light Turbine Training Helicopter (LTTH) design. Detailed disciplinary analyses are integrated through a common platform for efficient and centralized transfer of design information from one discipline to another in a collaborative manner. Several disciplinary and system level optimization problems are solved. After all the constraints of a multidisciplinary problem have been satisfied and an optimal design has been obtained, it is compared with the initial baseline, using the earlier developed OEC, to measure the level of improvement achieved. Finally a digital preliminary design is proposed. The proposed design methodology provides an automated design framework, facilitates parallel design by removing disciplinary interdependency, current and updated information is made available to all disciplines at all times of the design through a central collaborative repository, overall design time is reduced and an optimized design is achieved.
50
CAMMARANO, SANDRO. "STATIC AND DYNAMIC ANALYSIS OF HIGH-RISE BUILDINGS." Doctoral thesis, Politecnico di Torino, 2014. http://hdl.handle.net/11583/2565549.
Full textAbstract:
This thesis is focused on the structural behaviour of high-rise buildings subjected to transversal loads expressed in terms of shears and torsional moments. As horizontal reinforcement, the resistant skeleton of the construction can be composed by different vertical bracings, such as shear walls, braced frames and thin-walled open section profiles, having constant or variable geometrical properties along the height. In this way, most of the traditional structural schemes can be modelled, from moment resisting frames up to outrigger and tubular systems. In particular, an entire chapter is addressed to the case of thin-walled open section shear walls which are defined by a coupled flexural-torsional behaviour, as described by Vlasov’s theory of the sectorial areas.
From the analytical point of view, the three-dimensional formulation proposed by Al. Carpinteri and An. Carpinteri (1985) is considered and extended in order to perform dynamic analyses and encompass innovative structural solutions which can twist and taper from the bottom to the top of the building.
Such approach is based on the hypothesis of in-plane infinitely rigid floors which assure the connection between the vertical bracings and, consequently, reduce the number of degrees of freedom being only three for each level. By means of it, relevant design information such as the floor displacements, the external load distribution between the structural components, the internal actions, the free vibrations as well as the mode shapes can be quickly obtained.
The clearness and the conciseness of the matrix formulation allow to devise a simple computer program which, starting from basic information as the building geometry, the number and type of vertical stiffening, the material properties and the intensity of the external forces, provides essential results for preliminary designs.