Relevant bibliographies by topics / Concept selection. Pugh matrix

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  2. Dissertations / Theses
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  5. Conference papers

Academic literature on the topic 'Concept selection. Pugh matrix'

Author: Grafiati
Published: 4 June 2021
Last updated: 1 February 2022

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Journal articles on the topic "Concept selection. Pugh matrix"

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Hartanto, Broto Widya, and Subagyo Subagyo. "KERANGKA KERJA PERENCANAAN PENGEMBANGAN PRODUK SEBAGAI PENINGKATAN DAYA SAING INDUSTRI KECIL MENENGAH." Jurnal Teknosains 8, no. 1 (January 3, 2019): 26. http://dx.doi.org/10.22146/teknosains.35574.

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This study developed a new product development planning framework for small and medium enterprise (SME) in creative industry sector to increase the business competitiveness. The development process referred to the stages of design science research. The development stage adapted the first two stages of the modular function deployment (MFD), those are the description stage of consumer need through the house of quality, and functional decomposition. The study explained that the application of MFD adaptation is effective and adequate to the creative SME condition. The technical concepts were able to be screened and scored by using pugh selection matrix. However, every technical concepts could not be described into detailed domain functions and means. Therefore, the addition of methods applied in parallel was carried out, that is the concept decomposition with the function means tree, and the technical solution synthesis with the axiomatic design so that the design process is easier to handle. It’s recommended to eliminate the zigzagging process in axiomatic design, since it has been done on the function means tree and the use of customer relationship management data base to support voice of customer.
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Seechurn, Yashwantraj, and Ritish Boodhun. "Optimum Redesign of an Agricultural Water Bowser." Designs 2, no. 4 (November 5, 2018): 45. http://dx.doi.org/10.3390/designs2040045.

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There are many types of agricultural water bowsers on the market, which vary in geometry and size. However, in all such bowsers there are “unused spaces” between the bottom of the tank and the axle. The objective of this research was to design an agricultural water bowser with improved capacity by exploiting the “unused spaces”. This would allow a sufficient amount of water to be supplied to wide areas in a short time. Each concept of agricultural water bowser was generated as an integrated chassis water tank to be hitched to a tractor, and the best concept was chosen using a multi-criteria decision-making methodology (house of quality matrix and Pugh selection matrix). The selected design consisted of an U-shaped angle bent bottom sheet welded to a top circular sheet. The Agreement Dangerous Road (ADR) European standard was used for the sizing of the bowser and the selected material was S275 steel. The resultant forces on the shell of the bowser were calculated using analytical methods. A 3-D model of the bowser was developed in SolidWorks 2015, and the static structural analysis tool was used to examine stresses on the body for various types of loading, roads, and driving maneuvers. The shape and size of the bottom part of the proposed bowser increased the capacity of the tank by 20.3%.
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Nicholson, John Morgan, and Paul Collopy. "Pugh Controlled Convergence and Social Choice Theory." Proceedings of the Design Society: International Conference on Engineering Design 1, no. 1 (July 2019): 1245–54. http://dx.doi.org/10.1017/dsi.2019.130.

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AbstractThe Pugh Method of Controlled Convergence is evaluated based on social choice theory, both from an axiomatic basis, and by examining all possible cases of attribute ranks for a range of numbers of alternatives and numbers of attributes. The evaluation shows that, for a typical Pugh application, concept selection varies with the arbitrary choice of datum or is simply incorrect in about one-third of the cases. While there are merits to the iteration steps and creation of new alternatives within the Pugh method, a simpler and more expressive concept ranking procedure can give far superior results.
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Lønmo, Linda, and Gerrit Muller. "7.1.2 Concept Selection - Applying Pugh Matrices in the Subsea Processing Domain." INCOSE International Symposium 24, no. 1 (July 2014): 583–98. http://dx.doi.org/10.1002/j.2334-5837.2014.tb03169.x.

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Olabanji, Olayinka Mohammed, and Khumbulani Mpofu. "Fusing Multi-Attribute Decision Models for Decision Making to Achieve Optimal Product Design." Foundations of Computing and Decision Sciences 45, no. 4 (December 1, 2020): 305–37. http://dx.doi.org/10.2478/fcds-2020-0016.

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Abstract Manufacturers need to select the best design from alternative design concepts in order to meet up with the demand of customers and have a larger share of the competitive market that is flooded with multifarious designs. Evaluation of conceptual design alternatives can be modelled as a Multi-Criteria Decision Making (MCDM) process because it includes conflicting design features with different sub features. Hybridization of Multi Attribute Decision Making (MADM) models has been applied in various field of management, science and engineering in order to have a robust decision-making process but the extension of these hybridized MADM models to decision making in engineering design still requires attention. In this article, an integrated MADM model comprising of Fuzzy Analytic Hierarchy Process (FAHP), Fuzzy Pugh Matrix and Fuzzy VIKOR was developed and applied to evaluate conceptual designs of liquid spraying machine. The fuzzy AHP was used to determine weights of the design features and sub features by virtue of its fuzzified comparison matrix and synthetic extent evaluation. The fuzzy Pugh matrix provides a methodical structure for determining performance using all the design alternatives as basis and obtaining aggregates for the designs using the weights of the sub features. The fuzzy VIKOR generates the decision matrix from the aggregates of the fuzzified Pugh matrices and determine the best design concept from the defuzzified performance index. At the end, the optimal design concept is determined for the liquid spraying machine.
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López, Alana Rosa, Juan Luis Hernández Arellano, and Edson Francisco Estrada Meneses. "Comparison of Assistive Orthopedic Products using the Pugh Matrix. A Universal Design and Ergonomics Approach." Cultura Científica y Tecnológica 18, no. 1 (2021): 1–13. http://dx.doi.org/10.20983/culcyt.2021.1.2.3.

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The objective of this article is to analyze the relationship between universal design and ergonomics as key factors in the design and selection of assistive products developing a comparison using the Pugh matrix. A group of users was interviewed to determine the design requirements of aid products and then, the products available in the market were evaluated to determine which could be the best. The user’s needs were identified through the evaluations among patients with rheumatoid arthritis focusing on universal and ergonomic design and sixty-nine assistive products were selected. The Pugh matrix was applied to compare and evaluate them based on design criteria. The results indicate that accessibility products must be more efficient in terms of reach, grip, apprehension, pincer grasp, materials, and the force required to use the product. However, the aesthetics of the design was a key factor for the user to select the product and feel more comfortable when using it.
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Guo, Jiang Long, Laura Justham, Michael Jackson, and Robert Parkin. "A Concept Selection Method for Designing Climbing Robots." Key Engineering Materials 649 (June 2015): 22–29. http://dx.doi.org/10.4028/www.scientific.net/kem.649.22.

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This paper presents a concept selection methodology, inspired by the Verein Deutscher Ingenieure (VDI) model and Pugh's weighted matrix method, for designing climbing robots conceptually based on an up-to-date literature review. The proposed method is illustrated with a case study of ongoing research, the investigation of an adaptable and energetically autonomous climbing robot, in Loughborough University.
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de Camargo, Daniel Zancanella, Antonio Carlos Barbosa Zancanella, Luiz Rafael Resende da Silva, Rômulo Maziero, Bruno Dorneles de Castro, and Juan Carlos Campos Rubio. "Selection of Materials for Weight Reduction in Sports Cars." Advanced Materials Research 1152 (April 2019): 73–82. http://dx.doi.org/10.4028/www.scientific.net/amr.1152.73.

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The need for studies aiming at the selection of materials for such application is preponderant, be-cause a large increase in the focus on vehicle weight reduction by the automotive industry in recent years. In environmental and commercial terms, this reduction provides lower energy consumption and better vehicle performance, as well as limiting pollutant emissions. The present work has the objective to select the best materials in substitution of the metals and glass used in doors, hood and windows, respectively, of sports cars to decrease the weight/power ratio and consequently improvement of performance. With the aid of Ashby maps simulated through the CES EduPackTM 2018 program, maximizing the limit of tensile strength and minimizing density, it was possible to analyze that carbon fiber composites obtained values of merit index of up to eleven times greater than the value obtained by carbon steels. Already in substitution of the glass, the acrylic obtained a index of merit about three times greater. At the same time, the tensile strength, fracture toughness, density and cost of the possible materials obtained in the previous method were obtained through the Pugh matrix, the exchanges for composites of glass fiber and polycarbonate obtained outstanding responses.
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Solli, Herman, and Gerrit Muller. "Evaluation of illustrative ConOps and Decision Matrix as tools in concept selection." INCOSE International Symposium 26, no. 1 (July 2016): 2361–75. http://dx.doi.org/10.1002/j.2334-5837.2016.00300.x.

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F.A Zulkepli., N., S. Khusairi, M. S.B Shaari, N. S Khusaini, N. N Aziz., K. I Sainan, and Z. Mohamed. "Development of Universal Wheelchair Transporter." International Journal of Engineering & Technology 7, no. 4.27 (November 30, 2018): 63. http://dx.doi.org/10.14419/ijet.v7i4.27.22481.

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This work introduces a new universal wheelchair transporter to transport a conventional wheelchair from one point to another. The chosen design concept had been selected using Pugh chart selection method [13], considering all aspect contributed that give the highest weightage. The 3D design utilized CATIA software to visualize the product. Mecanum wheels were chosen to move the platform due to its flexibility and maneuverability in any direction without turning the universal transporter. The objective of this project is to develop a fully functional universal wheelchair transporter to transport a patient from one room to another room in the hospital. The performance of the product design is then tested using Finite Element Analysis and shows good results.
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Dissertations / Theses on the topic "Concept selection. Pugh matrix"

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Brinnen, Mikael, and Gustaf Laggar. "New Cutting Tool Concept For Cylinder Boring." Thesis, Uppsala universitet, Mikrosystemteknik, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-301768.

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This thesis describes the process and result of generating concepts for a new adjustable cutting tool with integrated components. It was conducted under a period of ten weeks at the department R&D Digital Machining at Sandvik Coromant, Sandviken. The focus of the thesis was to generate and evaluate different concepts using well known methods such as TRIZ Contradiction and 40 principles, SCAMPER, Wish and Wonder, Brainstorming, Weight Determination matrix and Pugh matrix.  To catch up on the latest technologies and similar tools in the industry today a literature study was conducted which resulted in a requirement specification for the concept in accordance with expertise from Sandvik Coromant. The key problems to be solved were the demanding tolerances and precision together with high forces and the limited space in the tool body.   The thesis resulted in a selected concept with chosen components to meet the demanding requirements. The concept is presented in a 3D CAD-model with description and necessary data. The conclusion includes recommendations to Sandvik Coromant to further develop the selected concept into a prototype so that physical test can be performed and lifespan of electronic components can be evaluated.
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Eklund, Adam, and Jesper Karner. "Development of a Framework for Concept Selection and Design Automation : Utilizing hybrid modeling for indirect parametric control of subdivision surfaces." Thesis, Linköpings universitet, Maskinkonstruktion, 2017. http://urn.kb.se/resolve?urn=urn:nbn:se:liu:diva-147755.

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Saab Aeronautics’ section Overall Design and Survivability develops early aircraft concepts and utilizes Computer Aided Design (CAD) to ensure the feasibility of principal- and critical characteristics. Saab has over the years developed several start models of aircrafts in CAD from pre-defined aircraft configurations, which are to some extent non-generic. When new configurations are to be explored, manual- and repetitive work is required if the new configuration cannot be attained solely through parametric modifications of a start model. The complexity of these CAD models also demands great knowledge of how aircraft components interact with each other to ensure compatibility. The project covered in this thesis was thus carried out to develop a more effective way for Saab to create and explore a larger design space. This by creating a framework that consists of a product configurator coupled with a library of generic CAD models. The product configurator that was created is the Saab Tradespace Analyzer & Reconfigurator (STAR), which takes compatibility relationships into consideration to facilitate concept selection. The STAR also provides a dynamic design space calculation to indicate how close the user is to a final concept selection. Two generic CAD models were created, a fuselage model and an air inlet model. A skeleton model was also created in order to reduce model dependencies and to control the main geometry of the aircraft product. In addition to these, an already existing wing model was implemented to form the library of generic CAD models. The framework coupling the STAR with the CAD library utilizes design automation to allow automatic CAD model generation of a concept that has been selected within the STAR. It was concluded through extrapolation that the created framework would allow Saab to create and explore a larger design space in a more effective way than what is done today, provided the library of CAD models were to contain the same number of components as today’s start models.
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Fox, David, and Nils-Robin Töyrä. "Optimering av ljuddiffuser – Monteringsvänlighet och kostnadsreducering." Thesis, KTH, Tillämpad maskinteknik (KTH Södertälje), 2018. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-232691.

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Målet med detta projekt har varit att utveckla en monteringsvänlig och kostnadseffektiv ljuddiffuser, en komponent som inte ska påverka ljudnivån och luftflödet för mycket, tillskillnad från den befintliga lösning som idag används i 3nine AB:s oljedimavskiljare. Examensarbetet följer den produktutvecklingsprocess som redogörs i boken Produktutveckling – Konstruktion och design av Karl T. Ulrich och Steven D. Eppinger. Där arbetet har anpassats för tidsramen på 10 veckor och delats upp i fyra faser. Fas1 – Förstudie, Fas 2 – faktainsamling, Fas 3 – Genomförande och Fas 4 – Rapportering. Den lösning som används idag består av fem vikta bitar sträckmetall som har sytts ihop med ståltråd, ljuddiffusern tar lång tid att montera ihop och att montera ned i maskinen. De fem vikta bitarna sträckmetall har vassa kanter efter klippning som försvårar monteringen ytterligare. En ljuddiffuser har en kostnad på 100 kr/st att framställa. För denna lösning togs mätvärden i 3nine AB:s verkstad fram som agerar som referensmätvärden, monteringstid – 333 [s], ljudnivå – 68 [dB], luftflöde – 319 [m ³/h] och DFA – index (mätvärde för monteringsvänlighet) – 5,4 %. Där 100 % ses som optimal monteringsvänlighet och högre DFA-index leder till reducerade kostnader. Då luft strömmar genom maskinen så påverkar detta mätvärdena och möjlig design av ny prototyper, men strömningslära är kunskaper som vi saknar och detta analyser med avseende på detta avgränsades bort. Genom Idéutvecklingsprocesser som Brainstorming, 6-3-5 Brainwritning, Morfologiskmatris, Pughmatris, konceptskisser, Virtuella koncept (3D-CAD) och friformsframställning (3D-utskrivning av prototyp) så togs fem prototyper fram som sedan testades för monteringstid, ljudnivå, luftflöde och DFA-index. Dessa tester resulterade i att det var en prototyp som utmärkte sig med förbättrade resultat jämfört med referensmätvärdena av befintliga ljuddiffusern. Mätvärden för prototypen ”45° väggen”, monteringstid – 16 [s], ljudnivå – 65 [dB], luftflöde – 342 [m ³/h] och DFA – index (mätvärde för monteringsvänlighet) – 93 %. Risk – och FEM-analys genomfördes på prototypen för att identifiera svagheter i konstruktionen, lösningar på dessa rekommenderas i form av små förändringar som t.ex. rundningar vid hörn. Dessa mätvärden redogör att den framtagna lösningen är bättre än dagens lösning och rekommenderas att implementeras och vidareutvecklas av företaget
The aim of this project has been to improve the existing noise diffuser used currently today in the oil-separatingmachines developed by 3nine AB. By reducing noise levels, increasing the air flow, increasing the “ease of assembly” and making it more cost effective. The thesis follows the product development process described in the book “Product Development - Construction and Design” by Karl T. Ulrich and Steven D. Eppinger. The work was adapted for a 10-week timeframe and divided into four phases. Phase 1 - Pre-Study, Phase 2 – Information gathering, Phase 3 - Implementation and Phase 4 - Reporting. The solution used today consists of five folded pieces of stretch metal that have been sewn together with steel wire, the noise diffuser takes a long time to assemble and to fit into the machine. The five folded pieces of stretch metal have sharp edges after cutting, which further complicates the assembly. The production cost for each diffuser is 100 kronor. For the present solution, the measurement values taken at 3nine AB's workshop were set as reference values, assembly time - 333 [s], noise level - 68 [dB], airflow - 319 [m³ / h] and DFA-index (measurement value for ease of assembly) - 5.4%. DFA-index when 100% is seen as the optimal ease of assembly and a higher DFA-index leads to reduced costs. As air flows through the machine, this affects the measured values and possible design of new prototypes, but fluid mechanics is one knowledge we lacked and therefor analysis of this was not possible and delimited. Through Idea Development Processes such as Brainstorming, 6-3-5 Brainwriting, Morphological Matrix, Pugh matrix, Concept Sketches, Virtual Concepts (3D-CAD) and Rapid prototyping (3D-prototype printing), five prototypes were produced, then tested for assembly time, noise level, airflow and DFA -index. These tests resulted in a prototype that featured improved results compared to the reference values of the existing noise diffuser. Measurement values for prototype "45° wall" where assembly time - 16 [s], noise level - 65 [dB], airflow - 342 [m³ / h] and DFA index - 93%. Risk-analysis and FEA was carried out on the same prototype to identify weaknesses in the design. The solutions to these weaknesses are recommended in the form of small design changes such as rounded sharp corners. These measured values state that the solution developed is better than today's solution and is recommended to be implemented and further developed by the company.
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Books on the topic "Concept selection. Pugh matrix"

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Kesoretskikh, Ivan, and Sergey Zotov. Landscape vulnerability: concept and assessment. ru: INFRA-M Academic Publishing LLC., 2019. http://dx.doi.org/10.12737/1045820.

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The monograph presents a methodology for assessing the vulnerability of landscapes to external influences. A comparative analysis of the concepts of "stability", "sensitivity", "vulnerability" in relation to natural complexes. An overview of existing methods for assessing the vulnerability of natural complexes is presented. The author's method of assessing the vulnerability of landscapes to anthropogenic impacts is described. The methodology is based on: selection and justification of criteria for assessing the vulnerability of landscapes; preparation of a parametric matrix and gradation of assessment criteria in accordance with the developed vulnerability classes; calculation of weighting factors of vulnerability assessment parameters; selection of optimal territorial operational unit for landscape vulnerability assessment. The method is implemented in the GIS environment "Assessment of vulnerability of landscapes of the Kaliningrad region to anthropogenic impacts", created by the authors using modern geoinformation products. The specificity of spatial differentiation of different landscapes in terms of vulnerability to anthropogenic impacts at the regional and local levels is revealed. It is stated that the use of the methodology for assessing the vulnerability of landscapes to anthropogenic impacts and its integration into the system of nature management will ensure a balanced account of geoecological features and environmental priorities in territorial planning. It is of interest to specialists in the field of rational nature management, environmental protection, spatial planning.
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Book chapters on the topic "Concept selection. Pugh matrix"

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Mansor, Muhd Ridzuan, S. M. Sapuan, Mohd Azli Salim, Mohd Zaid Akop, M. T. Musthafah, and M. A. Shaharuzaman. "Concurrent Design of Green Composites." In Green Business, 643–63. IGI Global, 2019. http://dx.doi.org/10.4018/978-1-5225-7915-1.ch032.

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This chapter presents the overview of concurrent design process of green composite products with special focus on conceptual design stage of natural fiber composites product development. Design of green composites product especially during the early product development stage requires three main aspects in product design which are materials, design and manufacturing process to satisfy lower cost, high quality and fast development time requirements in order to ensure successful product launch into the market. In this chapter, the concurrent design process of green composite products are discussed involving several main stages in product development such as green composite materials selection for both natural fiber and matrix constituents, conceptual design development and concept design selection of green composite products, and green composites manufacturing process selection. In addition, discussion on life cycle assessment of green composites is also included in order to provide further insight of the sustainability design requirements to the overall product development process.
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Endres, Julian, Reinhard C. Bernsteiner, and Christian Ploder. "A Framework for the Evaluation of NoSQL Databases for Big Data Use Cases." In Advances in Computer and Electrical Engineering, 66–90. IGI Global, 2020. http://dx.doi.org/10.4018/978-1-7998-2772-6.ch004.

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This article provides a comprehensive use case-based comparison framework for the selection of the most suitable database for specific requirements and application domains. The concept of a NoSQL Enterprise Readiness Index which is a comparable numeric measurement for the fitness of a NoSQL database in enterprise use cases is proposed. It is calculated by the fulfillment of a comprehensive set of weighted criteria distilled from comprehensive research. The goal of the developed NoSQL Enterprise Readiness Index (NERI) is to provide a numeric index value for the comparison and benchmarking of NoSQL databases in enterprise use cases. The calculation of NERI is based on 43 criteria in which the single database product is evaluated. To be reproducible with more products and to guarantee a consistent evaluation among the products, a fulfillment matrix is used. The fulfillment matrix describes for each of the 43 criteria the four different levels of fulfillment in a mostly qualitative way and therefore guides the evaluator in choosing the right point value.
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A. Dobrzański, Leszek. "Advanced Composites with Aluminum Alloys Matrix and Their Fabrication Processes." In Advanced Aluminium Composites and Alloys [Working Title]. IntechOpen, 2021. http://dx.doi.org/10.5772/intechopen.98677.

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This chapter introduces advanced aluminum alloy matrix composites and their manufacturing processes. In the beginning, the state of the art is characterized and the general characteristics of aluminum and its practical applications are presented, starting with the history of aluminum. The current approximate distribution of bauxite resources in the world and the production of bauxite and alumina in the leading countries of the world, as well as the production of primary and secondary aluminum and the range of aluminum end products, are presented. Aluminum alloys intended for plastic deformation and castings, and composite materials in general and with a matrix of aluminum alloys in particular, have been characterized in general. Against this background, a detailed review of the results of the Author’s own research included in numerous projects and own publications on advanced composite materials, their production technology, their structure, and properties were done. The range of aluminum alloy matrices of composite materials was adequately characterized, which include AlSi12, AlSi7Mg0.3, AlMg1SiCu, AlMg3, AlMg5, and AlMg9, respectively. Composite materials tested in terms of manufacturing technology include three groups. The first group includes gas pressure infiltration with liquid aluminum alloys of suitably formed porous preforms. Porous frameworks as a reinforcement for pressure-infiltrated composite materials with a matrix of aluminum alloys are produced by three methods. Al2O3 powder with the addition of 30–50% carbon fibers is uniaxially pressed, sintered, and heated to thermally degrade the carbon fibers and create the required pore sizes. In the second case, the ceramic porous skeleton is produced with the use of halloysite nanotubes HNTs by mechanical milling, press consolidation, and sintering. A third method is SLS selective laser sintering using titanium powders. Another group of manufacturing technologies is the mechanical synthesis of the mixture of AlMg1SiCu aluminum alloy powder and respectively, halloysite nanotubes HNTs in a volume fraction from 5 to 15% or multi-wall carbon nanotubes MWCNTs in a volume fraction from 0.5 to 5%, and subsequent consolidation involving plastic deformation. The third group of analyzed materials concerns composite surface layers on substrates of aluminum alloys produced by laser feathering of WC/W2C or SiC carbides. The structure and properties of the mentioned composite materials with aluminum alloys matrices are described in detail. The chapter summary provides final remarks on the importance of advanced aluminum alloy composite materials in industrial development. The importance of particular groups of engineering materials in the history and the development of the methodology for the selection of engineering materials, including the current stage of Materials 4.0, was emphasized. The importance of material design in engineering design is emphasized. Concepts of the development of societies were presented: Society 5.0 and Industry 4.0. The own concept of a holistic model of the extended Industry 4.0 was presented, taking into account advanced engineering materials and technological processes. Particular attention was paid to the importance of advanced composite materials with an aluminum alloy matrix in the context of the current stage of Industry 4.0 of the industrial revolution. Growth in the production of aluminum, its alloys, and composites with its matrix was compared with that of steel. Despite the 30 times less production, aluminum is important due to its lower density. The challenges posed by the development in the Industry 4.0 stage, including the expectations of the automotive and aviation industry, force constant progress in the development of new materials with the participation of aluminum, including the composite materials with an aluminum alloy matrix presented in this chapter.
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Shuqun, Yang, and Ding Shuliang. "A FCA-Based Cognitive Diagnosis Model for CAT." In Distance Education Environments and Emerging Software Systems, 151–70. IGI Global, 2011. http://dx.doi.org/10.4018/978-1-60960-539-1.ch010.

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There is little room for doubt about that cognitive diagnosis has received much attention recently. Computerized adaptive testing (CAT) is adaptive, fair, and efficient, which is suitable to large-scale examination. Traditional cognitive diagnostic test needs quite large number of items, the efficient and tailored CAT could be a remedy for it, so the CAT with cognitive diagnosis (CD-CAT) is prospective. It is more beneficial to the students who live in the developing area without rich source of teaching, and distance education is adopted there. CD is still in its infancy (Leighton at el.2007), and some flaws exist, one of which is that the rows/columns could form a Boolean lattice in Tatsuoka’s Q-matrix theory. Formal Concept Analysis (FCA) is proved to be a useful tool for cognitive science. Based on Rule Space Model (RSM) and the Attribute Hierarchy Method (AHM), FCA is applied into CD-CAT and concept lattices are served as the models of CD. The algorithms of constructing Qr matrice and concept lattices for CAT, and the theory and methods of diagnosing examinees and offering the best remedial measure to examinees are discussed in detail. The technology of item bank construction, item selection strategies in CD-CAT and estimation method are considered to design a systemic CD-CAT, which diagnoses examinees on-line and offers remedial measure for examinees in time. The result of Monte Carlo study shows that examinees’ knowledge states are well diagnosed and the precision in examinees’ abilities estimation is satisfied.
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Conference papers on the topic "Concept selection. Pugh matrix"

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Fernandes, Marcelo Machado, Antonio Cesar Rosati, Didimo Garcia Neto, Frank Kenji Goto, Helio Maciel, and Juliano Fujioka Mologni. "Quality Function Deployment (QFD) and Pugh Matrix on Innovative Concept Selection: an Application in Automotive Sector." In 2008 SAE Brasil Congress and Exhibit. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 2008. http://dx.doi.org/10.4271/2008-36-0017.

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Frey, Daniel D., Paulien M. Herder, Ype Wijnia, Eswaran Subrahmanian, Konstantinos Katsikopoulos, and Don P. Clausing. "An Evaluation of the Pugh Controlled Convergence Method." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34758.

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This paper evaluates a method known as Pugh Controlled Convergence and its relationship to recent developments in design theory. Computer executable models are proposed simulating a team of people involved in iterated cycles of evaluation, ideation, and investigation. The models suggest that: 1) convergence of the set of design concepts is facilitated by the selection of a strong datum concept; 2) iterated use of an evaluation matrix can facilitate convergence of expert opinion, especially if used to plan investigations conducted between matrix runs; and 3) ideation stimulated by the Pugh matrices can provide large benefits both by improving the set of alternatives and by facilitating convergence. As a basis of comparison, alternatives to Pugh’s methods were assessed such as using a single summary criterion or using a Borda count. The models we developed suggest that Pugh’s method, under a substantial range of assumptions, results in better design outcomes than those from these alternative procedures.
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Nagy, George. "A Review of the “Pugh” Methodology for Design Concept Selection." In International Congress & Exposition. 400 Commonwealth Drive, Warrendale, PA, United States: SAE International, 1994. http://dx.doi.org/10.4271/940887.

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Feldner, Mike. "A Six Sigma Approach to Improving Exhaust Valve Reliability in a Stoichiometric Natural Gas Engine." In ASME 2009 Internal Combustion Engine Division Spring Technical Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/ices2009-76094.

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Six-sigma is a data-based problem solving methodology that is used to reduce production variation in order to improve product quality. It has typically been used by successful companies to optimize operational processes and assist with waste reduction. Over the past several years, Dresser Waukesha has incorporated Six-sigma tools into several different areas of product engineering. This paper will illustrate how Dresser Waukesha has used Six-sigma tools to assist with product design and validation processes for reliability improvements of exhaust valves. Several specific examples of Six-sigma tools will be provided as the improvement project follows the DMAIC process. The scope of this discussion will be limited to using Six-sigma tools in the measure, analyze and improve phases of the project, where product engineering is most involved. In the measure phase, design of effective ratings charts that transform subjective visual assessments into quantifiable data for purposes of evaluating the effects of specific design parameters on critical wear metrics will be shown. Also, gauge repeatability & reproducibility for precise wear measurements will be discussed. During the analyze phase, the use of box plots, design of experiments tools and ANOVA statistical analyses for material selection, valve guide length and stem clearance determination will be explained. During the improve phase, an example of using the Pugh Matrix to compare different analytical concepts will be provided. Finally, an evaluation methodology that uses statistical capability analyses instead of traditional analyses of individual valve wear to validate long-term reliability and to minimize required test time will be explained.
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"APPLICATION OF PUGH SELECTION MATRIX AND TOPSIS METHOD FOR FUEL LEVEL SENSING TECHNOLOGY SELECTION." In International Conference on Advancements and Recent Innovations in Mechanical, Production and Industrial Engineering. ELK ASIA PACIFIC JOURNAL, 2016. http://dx.doi.org/10.16962/elkapj/si.arimpie-2016.6.

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Engler, William, Patrick Biltgen, and Dimitri Mavris. "Concept Selection Using an Interactive Reconfigurable Matrix of Alternatives (IRMA)." In 45th AIAA Aerospace Sciences Meeting and Exhibit. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2007. http://dx.doi.org/10.2514/6.2007-1194.

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Mullur, Anoop, Christopher Mattson, and Achille Messac. "New Decision Matrix Based Approach for Concept Selection Using Linear Physical Programming." In 44th AIAA/ASME/ASCE/AHS/ASC Structures, Structural Dynamics, and Materials Conference. Reston, Virigina: American Institute of Aeronautics and Astronautics, 2003. http://dx.doi.org/10.2514/6.2003-1446.

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Takai, Shun, Vivek K. Jikar, and Kenneth M. Ragsdell. "A Top-Down Concept Selection Integrating Analytical and Optimization Approaches." In ASME 2009 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2009. http://dx.doi.org/10.1115/detc2009-86738.

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This paper proposes a top-down approach for product concept selection. The proposed approach integrates an analytical approach to define an acceptable part specification range (part range), and an optimization approach to find optimum tolerances of part specifications. In the analytical part of the procedure, an inverse of design matrix is used to identify a part range. In the optimization part of the procedure, a product cost is defined as a function of part specification tolerances, and optimization algorithm is used to find optimum part specification tolerances that minimize the cost of the concept. The concept with the minimum cost is selected as the optimum concept. The usefulness of the proposed approach is demonstrated using an illustrative example.
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Salonen, Mikko, and Matti Perttula. "Utilization of Concept Selection Methods: A Survey of Finnish Industry." In ASME 2005 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2005. http://dx.doi.org/10.1115/detc2005-85047.

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Concept selection is an area of design research that has been under considerable interest over the years. There is, however, only little information on how the methods that have been presented in design research for this task have been adopted by industry. Thus, a survey was carried out in the Finnish industry. The results revealed that the degree of industrial utilization of formal concept selection methods was relatively low. Less than one out of four companies responded to use one or several of the formal methods included in the study: Pugh’s evaluation matrix, Rating matrices, or Analytic Hierarchy Process (AHP). Concept review meeting were reported as the most common approach for concept selection. However, a majority of the companies that did not utilize any formal method reported lacking effective and suitable methods for concept selection. The companies using formal methods were more satisfied. The first conclusion from the study is that there is a basis for a higher degree of utilization of formal concept selection methods in industry. Our second conclusion is that the existing formal concept selection methods do not entirely fulfill the needs of concept selection in an industry context. We propose that numerical concept selection methods should be further developed and extended to better support the decision-making practices of concept selection in industry. This type of concept selection is characterized by the participation of multiple decision makers through concept design reviews.
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Wang, Deng, Yiqiang Zhang, and Yaojie Sun. "A Criterion of Crop Selection Based on the Novel Concept of an Agrivoltaic Unit and M-matrix for Agrivoltaic Systems." In 2018 IEEE 7th World Conference on Photovoltaic Energy Conversion (WCPEC) (A Joint Conference of 45th IEEE PVSC, 28th PVSEC & 34th EU PVSEC). IEEE, 2018. http://dx.doi.org/10.1109/pvsc.2018.8547609.

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