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Dissertations / Theses on the topic 'Manual Order'
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Russell, Mardi L. "Cost and Throughput Modeling of Manual and Automated Order Fulfillment Systems." Thesis, Virginia Tech, 2001. http://hdl.handle.net/10919/32476.
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The e-commerce revolution has brought about the need for more efficient order fulfillment. Guidelines are needed to determine the order fulfillment system design, and whether a manual or automated system should be implemented. A spreadsheet-based descriptive model has been developed based on demand levels, labor rates, and order sizes. We propose to combine the descriptive model with simulation output to demonstrate reactions of the system to fluctuations in demand, labor rates, and order sizes. The ultimate research goal is to provide a design aid to companies engaged in order fulfillment systems, emphasizing the decision of whether or not to automate the sorting process.<br>Master of Science
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[Verfasser], Makusee Masae, Christoph [Akademischer Betreuer] Glock, and Fabio [Akademischer Betreuer] Sgarbossa. "Developing efficient order picker routing policies in manual picker-to-parts order picking systems / Makusee Masae ; Christoph Glock, Fabio Sgarbossa." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2020. http://d-nb.info/1204200807/34.
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Masae, Makusee [Verfasser], Christoph [Akademischer Betreuer] Glock, and Fabio [Akademischer Betreuer] Sgarbossa. "Developing efficient order picker routing policies in manual picker-to-parts order picking systems / Makusee Masae ; Christoph Glock, Fabio Sgarbossa." Darmstadt : Universitäts- und Landesbibliothek Darmstadt, 2020. http://d-nb.info/1204200807/34.
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Ehmann, Markus Friedrich. "Developing a methodical approach for the systematic identification of innovative technological applications, based on mixed reality in manual order picking." Thesis, University of Plymouth, 2014. http://hdl.handle.net/10026.1/3027.
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The need to be economically successful is the key driver for companies to be innovative and implement new technologies with increasing efficiency and effectiveness. Uncertainty about whether to use new technologies and missing knowledge about their advantages lead to staggering and withholding from fast diffusion of innovations. Focusing on the industry of logistics and the technology Mixed Reality, this research project developed a methodical approach for evaluating the fitness of an innovative technology and a specific process of application. A mixed methods approach was derived, based on interviews and experiments. The main methodologies used, were semi-structured interviews with decision makers in logistics companies to elaborate triggering criteria in the investment process and laboratory experiments for the evaluation of competing technologies. These methods were framed by an initial field experiment and feedback interviews after the analysis for the validation of the approach. The research proved the competitively viable applicability of Mixed Reality and its specific strengths and weaknesses in manual order picking. This set the foundation for possible further development and implementation of the technology. The developed methodological approach proved to be a valid and reliable assessment of the intersection between a technology and specified process of application. This can greatly enhance the speed of implementing new innovations and gaining competitive advantages for companies.
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King, Heinz Peter. "A late medieval confession manual : its author and context." Thesis, University of St Andrews, 2018. http://hdl.handle.net/10023/16416.
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This thesis focuses on the Summa Angelica de casibus conscientie written by Angelo da Chivasso (d. 1495), first printed in 1486. Angelo belonged to the Observantine branch of the Franciscan Order and was its vicar general four times. Having documented Angelo's life and career, the thesis centres on the construction and purpose of his Summa. It assesses its originality within the tradition of confession manuals and the reasons for its popularity. It argues that the structure is very clear because Angelo intended it for the use of simplices confessores, by which he probably meant priests who did not have a university degree. He arranged his material alphabetically and in the longer sections, paragraphs were numbered, making cross-referencing easy. He included a list of authorities and explained the manner of quoting from them. Not all these features were original, but together they helped to make the Summa popular. There are several noteworthy features of Angelo's Summa. The procedures described had been laid down in earlier manuals, including the need for more rigorous questions - ad status – relating to the profession of each penitent and where this might lead to sin. Angelo however diverged from some earlier authorities by warning about excessive rigour. Circumstances were to be taken into account, and where possible penitents to be given the benefit of the doubt. The number of copies of Angelo's Summa printed throughout Western Christendom during his lifetime and following his death are a tribute to its importance. The period of fame however, was short. Martin Luther was a particularly virulent critic of the Summa, and the Catholic Church changed the method of hearing confessions, making much of it redundant, though it survived for some centuries more as a work of reference for confessors.
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Casciano, Chiara. "Razionalizzazione di un magazzino componentistica per linee di assemblaggio di segnali aeroportuali: il caso Ocem Airfield Technology." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2016.
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Questa tesi si propone di illustrare il lavoro da me svolto presso l’azienda Ocem Airfield Technology all’interno del magazzino componentistica mirato alla riorganizzazione del supermarket delle linee di assemblaggio nell’ottica della minimizzazione dei tempi di prelievo.
La continua ricerca di flessibilità sulla base delle esigenza della clientela ha un drastico effetto sul magazzino e sulla sua gestione. Il magazzino rappresenta un elemento estremamente oneroso nel bilancio aziendale e contribuisce per il 20% ai costi interni dell’impresa. Hanno un ruolo cruciale nel funzionamento aziendale: i magazzini sono il luogo di attesa per i prodotti dal punto di origine a quello di consumo, garantiscono l’immagazzinamento e lo stoccaggio della merce ed infine sono un driver fondamentale per ridurre l’incertezza. Tra le attività più costose si colloca il prelievo frazionato della merce o order picking, responsabile del 55% dei costi operativi logistici.
Nell'ambito Ocem è stato implementato un progetto per la riduzione dei tempi di prelievo ispirandosi a modelli nati in letteratura. Il progetto inizialmente è stato testato su una linea pilota a bassi volumi per monitorare i possibili vantaggi. Una volta confermata la riduzione effettiva dei tempi di prelievo, il progetto è stato replicato con le opportune modifiche sulle restanti linee di assemblaggio raggiungendo incrementi di efficienza significativi. Il parametro adottato come performance index è stata la riduzione percentuale del tempo di prelievo dall’as-is al to-be.
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Farcasiu, Simina Maria. "Medieval Castilian literature and the religious orders : a study of three writers." Thesis, Queen Mary, University of London, 1985. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.339011.
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Mandel, Jörg [Verfasser], and Engelbert [Akademischer Betreuer] Westkämper. "Modell zur Gestaltung von Build-to-Order-Produktionsnetzwerken / Jörg Mandel. Betreuer: Engelbert Westkämper." Stuttgart : Universitätsbibliothek der Universität Stuttgart, 2012. http://d-nb.info/1025852109/34.
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Brüderlin, Manuel Pedro [Verfasser], Marek [Akademischer Betreuer] Behr, and Kai-Uwe [Akademischer Betreuer] Schröder. "A procedure for reduced-order model based robust aeroelastic control / Manuel Pedro Brüderlin ; Marek Behr, Kai-Uwe Schröder." Aachen : Universitätsbibliothek der RWTH Aachen, 2019. http://d-nb.info/1193656699/34.
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Müller, Thomas [Verfasser], Manuel [Akademischer Betreuer] Angst та Uwe [Akademischer Betreuer] Klemradt. "Order and disorder in the charge and spin structures of YFe2O4-δ and Ni0.42Mn0.58TiO3 / Thomas Müller ; Manuel Angst, Uwe Klemradt". Aachen : Universitätsbibliothek der RWTH Aachen, 2018. http://d-nb.info/1181335116/34.
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Bates, Christina Jean. "Prescription and Practice: A Comparison of Child-Care Manuals, Fashion Journals and Mail-Order Catalogues on the Subject of Children's Dress 1875-1900." W&M ScholarWorks, 1989. https://scholarworks.wm.edu/etd/1539625490.
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Eriksson, Therese. "The Structural Basis for Magnetic Order in New Manganese Compounds." Doctoral thesis, Uppsala : Acta Universitatis Upsaliensis : Univ.-bibl. [distributör], 2005. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-5746.
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Silva, Silvio Ribeiro da. "Ensino de produção escrita de generos da ordem do argumentar : o papel do livro didatico de portugues e a atuação do professor." [s.n.], 2008. http://repositorio.unicamp.br/jspui/handle/REPOSIP/269462.
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Orientador: Maria Augusta Bastos de Mattos<br>Tese (doutorado) - Universidade Estadual de Campinas, Instituto de Estudos da Linguagem<br>Made available in DSpace on 2018-08-12T06:45:58Z (GMT). No. of bitstreams: 1
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Previous issue date: 2008<br>Resumo: Com este estudo, intencionei refletir e analisar se a forma como alguns gêneros da ordem do argumentar são trabalhados numa escola pública (4º ciclo - 7ª e 8ª séries), no ensino de Língua Portuguesa (na figura do LDP e do professor), na produção de textos escritos, colabora para a formação de produtores desses textos. As perguntas que motivaram sua realização foram: (i) Como alguns gêneros da ordem do argumentar são trabalhados nas aulas de Língua Portuguesa nas atividades de produção escrita de um LDP? e (ii) Que reflexos do ensino do LDP e do professor são percebidos em alguns textos escritos pelos alunos em gêneros da ordem do argumentar? Para respondê-las, desenvolvi um estudo baseado nos procedimentos metodológicos da Lingüística Aplicada (LA) com base interpretativista, focalizando o processo de uso da linguagem. O corpus de análise do estudo foi constituído por algumas das propostas de produção escrita de gêneros argumentativos apresentadas pelo LDP "Português - Linguagens", pelas aulas em que duas professoras desenvolveram as atividades relacionadas a essas propostas de produção e pelos respectivos textos escritos pelos alunos. Com a análise dos dados, percebi que os alunos conseguem, de maneira geral, produzir textos argumentativos escritos. Concluí que eles levam para seus textos reflexos do conhecimento extra-escolar sobre a produção de gêneros argumentativos escritos, tendo em vista marcas estilísticas e temáticas detectadas nos textos não ensinadas pelo LDP nem pelas professoras. Este estudo indica que muito do conhecimento sobre argumentação que o aluno mostra no texto escrito não vem da contribuição direta do LDP, nem do professor. Deve vir, portanto, de suas experiências extra-escolares.<br>Abstract: With this study, I intend to reflect on and to analyze whether the way some argumentative genres are explored in a public school (4th cycle - 7th and 8th grades), in the class of Portuguese Language (in the figure of the LDP and the teacher), in the production of written texts, collaborates for training the producers of these texts. The questions that motivated its accomplishment were: (i) How are some argumentative genres are explored in Portuguese Language classes in the activities of written production of a LDP? and (ii) What effects of LDP's and teachers' teaching are perceived in some texts written by pupils using argumentative genres? To answer them, I developed a study based on interpretivist Applied Linguistics (AL) methodological procedures, focusing on the process of language use. The corpus for analysis consists in some of the proposals of written production of argumentative genres presented by the LDP "Português - Linguagens", by the classes where two teachers developed the activities related to these proposals of production and by the corresponding texts written by the pupils. Data analysis showed that pupils generally are able to produce written argumentative genres. I concluded that they bring to their texts some traces of extra-school knowledge on the production of written argumentative genres as regards the stylistic and thematic marks detected in the texts that were not taught by the LDP or by teachers. This study indicates that much of the knowledge on argumentation pupils show in written texts does not come from the direct contribution of the LDP or the teacher's. It must come, therefore, from pupils'
extra- school experiences.<br>Doutorado<br>Lingua Materna<br>Doutor em Linguística Aplicada
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Pagliarani, Ridolfi Sara. "I sistemi di Order Picking e le decisioni critiche per la loro progettazione e ottimizzazione: il caso Tulips S.r.l." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2020.
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Il magazzino è la parte fondamentale del business di molte realtà aziendali, tra cui si trovano i sistemi di order-picking (OPS) ovvero quei sistemi in cui i prodotti vengono stoccati a magazzino per essere poi prelevati meccanicamente o manualmente dagli operatori per soddisfare la domanda dei clienti interni e/o esterni all’azienda. Con questo elaborato si vuole fornire un quadro teorico sui sistemi OP, sulle loro caratteristiche e tipologie e sulle aree decisionali al momento della loro progettazione e/o ottimizzazione. Successivamente, servendosi dell’azienda Tulips Srl, si vuole fornire un’analisi del sistema a prelievo frazionato in atto nella loro sede di Cesena e il procedimento utilizzato per la progettazione parziale del magazzino nella nuova sede di Rimini. Lo scopo principale della progettazione di un OPS è quello di diminuire il tempo e la distanza di attraversamento dell’operatore durante il picking. Questo perché come dimostrato da Tompkins il tempo speso da un operatore per gli spostamenti utili al prelievo ammonta al 50% sul totale delle operazioni, andando conseguentemente ad incidere sui costi operativi del magazzino. Per questo motivo, lo scopo della progettazione, che si è basato sulle scelte di routing and sequencing problem e sui problemi di product allocation and assignment, ha avuto come scopo principale quello di condensare l’area del picking. La strategia utilizzata per l’assegnamento è stata la class-based storage policy e il criterio di assegnamento dei prodotti alle classi utilizzato è stato il Popularity assignment rule. Una volta assegnati i prodotti alle classi è stati possibile assegnare le classi alle corsie in modo da avere i prodotti desiderabili all’inizio del percorso. Questa pratica ha permesso di convogliare il maggior numero di prelievi in una certa area, quella più vicina al punto di stoccaggio degli ordini pronti nei reparti, e di ridurre conseguentemente le distanze di viaggio.
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Salmassian, Leyla. "Spirituality and Art Therapy: The Practice of Sufi Zikr, Sufi Meditation Tamarkoz and Art-Making From an Art Therapist’s Lens." Digital Commons at Loyola Marymount University and Loyola Law School, 2017. https://digitalcommons.lmu.edu/etd/298.
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This research examines the effects of a daily, ritualistic, intentional practice of Sufi meditation Tamarzok, Sufi Zikr and art making in the life of a female art therapist graduate student, in a transitional professional and developmental stage of life. The general psychology and art therapy literature were examined to look at contemporary understanding in the integration of spirituality and art in mental health. A lack of information in the art therapy literature prompted the interest in the development of this study to respond to this inquiry. This art-centered research informed by a heuristic, phenomenological, dialectical inquiry of self-examination, encompassed the practice of Sufi Zikr and Sufi meditation Tamarkoz as understood from the perspective of the Sufi Order Maktab Tarighat Oveyssi Shahmaghsoudi School of Islamic Sufism, followed by art making as a way of documenting and contextualizing the qualities of the internal and external emotional landscapes to uncover themes and broaden self-knowledge in the support and enhancement of growth and well-being. The data was analyzed by looking at emergent themes. Conclusions drawn aligned the combined practices of art making and spirituality to that of a relational home where the Self and all parts of the psyche can coexist and contextualized for meanings to emerge and healing to take place. The findings of this inquiry were in overall alignment with the reviewed art therapy literature; gaps in the reviewed literature were noted in the exploration of the somatic component of the practice of art making as it relates to healing. Further research is warranted to expand and explore the data and the uncovered areas.
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Petchezi, Awedeou. "Le transfert international de monnaie : aspect du régime juridique des systèmes de paiement." Thesis, Clermont-Ferrand 1, 2014. http://www.theses.fr/2014CLF10427.
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La monnaie est au coeur des rapports de droit et d’obligation qui se créent dans les transactions des plus simples au plus complexes. Cette prépondérance de la monnaie trouve sa justification dans ses fonctions juridiques et économiques d’instrument de mesure, de réserve de la valeur de biens et services, et également de sa fonction de moyen de paiement. Les flux quotidiens de monnaie révèlent cette importance. Si ces rapports de droit doublés d’une dimension économique sont habituellement confinés dans un cadre géographique étatique, ils suivent aujourd’hui une tendance à l’internationalisation. La circulation de la monnaie suit la même tendance en dépassant le simple cadre des États. Pour assurer le transfert de la monnaie par-delà les frontières, diverses techniques ont pendant longtemps été utilisées. Les premières apparurent dans les foires du Moyen Âge avec l’utilisation des effets de commerce (lettre de change et billet à ordre) et plus tardivement du chèque. Ces premières techniques traditionnelles qui ont la particularité de reposer sur du support papier déclinent et cèdent la place à de nouvelles techniques (virement électronique, carte électronique, porte-monnaie électronique). L’exigence de célérité inhérente à l’activité commerciale a fait ressentir un besoin d’innovation qui s’est traduit par la création de nouvelles techniques de transfert de la monnaie voire d’une nouvelle forme de monnaie : la « monnaie électronique ». Une autre innovation majeure réside dans l’émergence grâce à l’informatique des « systèmes de paiement » qui constituent un nouveau cadre de réalisation des transferts de fonds.L’élément d’extranéité inhérent au caractère international de l’utilisation des nouvelles techniques de transfert de monnaie pose la récurrente problématique des conflits de lois. Si pour les techniques traditionnelles de transferts de fonds, des initiatives d’uniformisation (conventions de Genève relatives à la lettre de change et au chèque) ont permis de résoudre à certains égards cette difficulté, il n’existe pas pour l’heure un cadre légal spécifique régissant l’utilisation internationale des nouvelles techniques de transfert de fonds. Il n’existe non plus à l’échelle internationale, de texte législatif régissant les nouveaux systèmes de transferts de fonds. Face à ce vide législatif, ne convient-il pas de prendre en considération la nature contractuelle des relations qui se nouent grâce à l’informatique dans les systèmes de transferts de fonds et de déterminer une « loi contractuelle » qui aurait vocation à régir les nouvelles techniques de transferts de fonds présentant un caractère international ? Cette thèse se propose à cet effet de démontrer la nature contractuelle des divers rapports qui se nouent dans les systèmes des transferts internationaux de fonds. Une telle qualification contractuelle en amont permet de soutenir en aval l’idée d’une applicabilité d’un régime contractuel aux nouvelles techniques de transferts de fonds<br>Legal relations are based essentially on the monetary obligations. The dominant role of money is explained by its legal and economic functions. The daily flow of money transfers attest this importance. If those legal and economic relations are usually located in a limited geographical area, they now follow a movement towards internationalization. The circulation of money also follows the same movement beyond the simple framework of a country. To ensure the funds transfer across borders, various techniques have long time allowed to make international money transfers. Early techniques appeared in fairs of the middle Ages, with the use of commercial paper (bill of exchange or promissory note) and later the check. These traditional instruments which have the characteristic of being based on the paper declined to give way to new techniques. The celerity required by business, has created a need of innovation. It explains the creation of new techniques of money transfer and a new form of currency: the "electronic money”. Another important innovation is the emergence through the computing, "systems" that are a new framework of funds transfers.The foreign element related to international nature of the new techniques of money transfer raises the legal problem of conflict of laws. If for traditional techniques of fund transfer, standardization initiatives (Geneva Conventions on bills of exchange and checks) seem to have solved this problem, there is not presently, any uniform law governing the international use of new techniques of funds transfer. So, is it necessary to consider the nature of contractual relationships which are formed thanks to computing in systems in order to determine a “contract law” able to govern the new techniques of international funds transfers
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Marty, Marie. "La légalité de la preuve dans l'espace pénal européen." Thesis, Bordeaux, 2014. http://www.theses.fr/2014BORD0107/document.
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La recevabilité de la preuve est sans doute l’une des questions les plusimportantes de l’espace de liberté, de sécurité et de justice de l’Union européenne,mais aussi une des plus complexes. Les difficultés relatives à l’utilisation d’unepreuve recueillie dans un État membre, devant les juridictions répressives d’un autreÉtat membre, semblent cependant avoir été sous-estimées par le législateureuropéen. En effet, l’amélioration de l’efficacité de la répression transnationale a étéune des priorités de la politique criminelle de l’Union ces quinze dernières années. Àce titre, le renforcement des mécanismes de coopération judiciaire, y compris ceuxvisant à l’obtention de la preuve transnationale, a été privilégié. Grâce au principe dereconnaissance mutuelle des décisions judiciaires en matière pénale, fondé sur laconfiance réciproque que les États membres se portent, les divergences etéventuelles incompatibilités entre les systèmes nationaux ont été tenues en échec,permettant ainsi la libre circulation des preuves dans l’espace pénal européen.Cependant, cette justification théorique n’est pas suffisante pour assurer larecevabilité mutuelle des preuves, la bonne administration de la preuve pénaledemeurant une question nationale, souverainement appréciée par le juge national.De plus, tant l’étude comparative des régimes probatoires nationaux que laprésentation des instruments de coopération judiciaire montrent des déficiencesprofondes, appelant ainsi à une protection accrue et harmonisée des droitsfondamentaux dans les procédures répressives au niveau européen, dans le butd’assurer la recevabilité mutuelle des preuves pénales dans l’espace pénaleuropéen<br>Admissibility of evidence is one of the most crucial and complicatedissues in the European Union’s area of freedom, security and justice. However, thedifficulties regarding the use of evidence gathered in one Member State inproceedings in another Member State through the mechanisms of judicialcooperation seems to have been underestimated by the European Union legislator,and this despite the success of criminal proceedings with a cross-border characterbeing considered a priority for the last fifteen years. Indeed, the EU’s criminal policyhas been striving for the strengthening of the efficiency of judicial cooperationbetween judicial authorities. This requires the improvement of the instrumentsdedicated to obtaining criminal evidence. Thanks to the principle of mutualrecognition of judicial decisions in criminal matters, based on mutual trust betweenMember States, the differences between and potential incompatibilities of nationalsystems should not be an obstacle to the free circulation of evidence in the EUcriminal justice area.However, this theoretical justification is not sufficient to ensure mutual admissibility ofevidence, as the good administration of evidence remains a national issue, with awide margin of appreciation accorded to the national judge. Furthermore, both thestudy of national procedural norms and the study of the European Union legalframework show deficiencies, requiring a coherent concept for the protection offundamental rights in criminal proceedings at the EU-level. A better and harmonisedprotection of procedural guarantees is the path to ensure the mutual admissibility ofevidence, overcoming national differences
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Wang, Yi-Wen, and 王怡文. "Order batching algorithms based on fuzzy similarity for a manual order picking system." Thesis, 2007. http://ndltd.ncl.edu.tw/handle/zjm675.
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碩士<br>國立臺灣科技大學<br>工業管理系<br>95<br>Order batching policy decide the method to combine order to form batch. If the orders with similar picking location are integrated into a batch and are picked in the same picking tour, the order bathing can reduce the total distance of all order finished and promote the efficiency of operation in the manual order picking system. Since batching is an NP-hard problem, this paper proposes a heuristic algorithms base on fuzzy similarity clustering for each of the three routing policies, return, traversal and largest gap. The similar degree of two orders can be recognized effectively by fuzzy similarity. This enables the heuristic to attain the better solution for order batch problem. To verity the efficiency of the heuristic, this paper compares other existing algorithms through computer simulation. The result indicates that the proposed heuristic algorithm has batter performance. Furthermore, the algorithm is quite simple and can be easily applied in practice.
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Masae, Makusee. "Developing efficient order picker routing policies in manual picker-to-parts order picking systems." Phd thesis, 2020. https://tuprints.ulb.tu-darmstadt.de/11290/7/Developing%20efficient%20order%20picker%20routing%20policies%20in%20manual%20picker-to-parts%20order%20picking%20systems_Makusee%20Masae_PhD%20Thesis.pdf.
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This dissertation develops several efficient order picker routing policies for manual picker-to-parts order picking systems. This work consists of six chapters and is structured as follows. Chapter 1 provides a brief introduction of the dissertation. Chapter 2 then presents the results of a systematic review of research on order picker routing. First, it identifies order picker routing policies in a systematic search of the literature and then develops a conceptual framework for categorizing the various policies. Order picker routing policies identified during the literature search are then descriptively analyzed and discussed in light of the developed framework. Our discussion of the state-of-knowledge of order picker routing shows that there is potential for future research to develop exact algorithms and heuristics for the routing of order pickers, both for order picking in specific scenarios and/or for non-conventional warehouses. One result of the literature review is that prior research on order picker routing always assumed that the picking tour starts and ends at the same location, which is usually the depot. In practice, however, it does not necessarily start and end at the same location, for example in case picking tours are updated in real time while they are being completed. Therefore, Chapter 3 proposes an exact algorithm as well as a routing heuristic for a conventional warehouse with two blocks where the starting and ending points of the picking tour are not fixed to the depot, but where they can be any locations in the warehouse instead. This chapter extends an earlier work of Löffler et al. (2018), who studied the case of a conventional warehouse with a single block, and adapts the solution procedures proposed by Ratliff and Rosenthal (1983) and Roodbergen and de Koster (2001a) that are both based on graph theory and dynamic programming procedure. Chapter 3 also develops a routing heuristic, denoted S*-shape, for solving the order picker routing problem in this scenario. In computational experiments, we compare the performance of the proposed routing heuristic to the exact algorithm. Our results indicate that the exact algorithm obtained tours that were between 6.32% and 35.34% shorter than those generated by the heuristic.
One of the observations of Chapter 2 is that the order picker routing problem in non-conventional warehouses has not received much attention yet. Therefore, Chapter 4 studies the problem of routing an order picker in a non-conventional warehouse that has been referred to as the chevron warehouse in the literature. We propose an optimal order picker routing policy based on the solution procedures proposed by Ratliff and Rosenthal (1983) and Roodbergen and de Koster (2001a). Moreover, we modify three simple routing heuristics, namely the chevron midpoint, chevron largest gap, and chevron S-shape heuristics. The average order picking tour lengths resulting from the exact algorithm and the three routing heuristics were compared to evaluate the performance of the routing heuristics under various demand distributions and storage assignment policies used in warehouses. The results indicate that the picking tours resulting from the exact algorithm are 10.29% to 39.08% shorter than the picking tours generated by the routing heuristics. Chapter 5 then proposes an exact order picker routing algorithm for another non-conventional warehouse referred to as the leaf warehouse, and it again uses the concepts of Ratliff and Rosenthal (1983) and Roodbergen and de Koster (2001a). Moreover, it proposes four simple routing heuristics, referred to as the leaf S-shape, leaf return, leaf midpoint, and leaf largest gap heuristics. Similar to Chapter 4, we evaluate the performance of these heuristics compared to the exact algorithm for various demand distributions and storage assignment policies. Our results show that the picking tours resulting from the exact algorithm were, on average, between 3.96% to 43.68% shorter than the picking tours generated by the routing heuristics. Finally, Chapter 6 concludes the dissertation and presents an outlook on future research opportunities.
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Chung, Peiyi, and 鍾珮宜. "Using Lean Six Sigma in Manual Order Picking Operation Improvement." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/32419967103384506121.
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碩士<br>中國科技大學<br>運籌管理研究所<br>99<br>With the development of Economic and technological, life has become more and more convenient. People can shop at home, pay and wait for the goods. The distribution operation problems have got great attention in the logistics industries. Order picking is the core part in the entire logistics and distribution processes. The purpose of this study is to reduce costs and improve efficiency for the case company by planning and managing picking system.
Lean Production can help companies to establish standards of the enhance processes speed; Six Sigma statistical methods can be used to count the error, and resolve deficiencies; Lean Six Sigma was combined with Lean and Six Sigma, it's provides a systematic and a data ways to increase speed of the processes, and reduce time to improve quality of product.
The purpose of this study has be use Lean Six Sigma to application in order picking processes. By apply Lean Six Sigma of DMAIC analysis: First, understanding the product of cycle, with the efficiency of processes cycle to calculations and quickly determine problems. Second, to propose effective improvement, and in the process has to definition case company's current status and problems, then to measure the current processes cycle of efficiency, and to analysis processes find out basic problems. Finally, to propose and has to the improvement, then to establish an improvement continuous control of mechanism, and expect to continuous operation.
As a result, through improved of processes cycle the efficiency (PCE), from the original of 12.4% to 16.7%, increased of 4.4%, the processes time was reduced to from the original 5,303 minutes to 3,795 minutes, substantial reduction of 28%; the effectiveness of these improvements are use to Lean Six Sigma of technique and quick to find out more unnecessary waste, then solve the problems and immediate improvement and has being a result.
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Ying, Yang Chia, and 楊佳穎. "The study of performance evaluation of order batching size in a manual warehouse." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/36301710813421946526.
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碩士<br>萬能科技大學<br>資訊管理研究所<br>100<br>Warehouse operation plays a key role to a supply chain and a proper performance evaluation criterion can aid the designer to quickly evaluate design alternatives for both warehouse configurations and operations. This thesis presents a throughput time evaluation model in a warehousing system with the COI-based storage policy and the traversal policy to analysis the optimal batch size. After deriving the first and second moments of the order-picker’s service time, this study applies these moments to estimate the expected throughput time. Since the arrival of orders follows a Poisson process, the batching time of orders has an Erlang distribution and hence the order picking system under investigation is regarded as an G/G/1 queueing model. This thesis uses the Flexsim simulation package to validate the results generated by the model. The result indicate that the approximation method appears to be sufficiently accurate. Moreover, the effects of batch size and popularity skewness on the travel time are discussed.
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Chou, Shin-Chun, and 周士俊. "A Study on the Manual Order Picking Policies by Tabu Search in Distribution Center." Thesis, 2000. http://ndltd.ncl.edu.tw/handle/36987064553562993856.
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碩士<br>元智大學<br>工業工程研究所<br>88<br>The distribution center (DC) has to make optimal order picking decisions to satisfy the customers’ demands at reasonable order picking cost during the rapid business flow process. Hence, order picking policies play an important role in a DC and the exact planning can also reduce operational costs of DC. This study integrated the order batching and route planning problems in a manual picking area. In order to obtain a better order picking policy, this study searches for a global solution (or near optimum) by tabu search rather than traditional local search method. Finally, an experimental design was made to analyze some design parameters of the tabu search to the order batching and routing planning problem. The results show that the factors of the exchange method are significant in both solution quality and efficiency.
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Shih, Po-Hsun, and 施伯勳. "A Study of storage location assignment problem for multi-picker manual order-picking systems." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/45898927488985961088.
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博士<br>國立臺灣科技大學<br>工業管理系<br>96<br>This study investigates an order picking system involving multiple pickers in a warehouse. Travel distance or travel time has usually been employed to measure order-picking efficiency, since most previous studies assumed an order picking system only undertakes single picker operations. However, multiple pickers frequently work in the same area concurrently in an actual warehouse system and congestion inevitably takes place and the traditional travel distance or travel time might not be a proper measure for the system efficiency. Consequently, this study proposes a throughput model for the determination of the picking operation performance for such multiple-picker environment to consider a trade-off between the picking distance and the blocking-caused delay for the storage assignment. The proposed model is first validated by a simulation experiment and then used to compare the throughput of the warehouse under two popular storage assignment strategies with different demand distributions of stock keep units in the order picking system.
The study developed a storage assignment heuristic. The objective of heuristic is to maximize throughput rate of order picking system. The study compares the throughput rare for different storage assignment policies and demand skewness. The results show that the heuristic policy is better than another storage assignment policy.
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Lo, Wan-Chen, and 羅婉珍. "Applying Particle Swarm Algorithm to the Batch Order Policies in Manual Picking System of Distribution Center." Thesis, 2009. http://ndltd.ncl.edu.tw/handle/39064981093794019806.
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碩士<br>元智大學<br>工業工程與管理學系<br>97<br>The order picking is one of the important and complex operations in the distribution center. The order picking time accounts for 30%~40% of total operation time in distribution center. Hence, a well planned order picking strategy can reduce the operating cost of the distribution center effectively. In this study, the optimal order picking strategies were evaluated. We used two order batching methods (Random Batching and Least Aisle Batching) combined with two route planning methods (Traversal Strategy and Largest Gap Strategy) to determine the initial solutions. Then, we used Particle Swarm Optimization (PSO) to improve the initial solution and then tried to achieve the optimum solution. Finally, we utilized the MINITAB statistical software to test t the relationships among initial solutions, order picking strategies and the load limit of the picking cart. The results showed that the initial solutions had no statistical significance on the order picking distance. While order picking strategies and load limit had more influence on the order picking distance. We also found that the largest gap strategy had best performance in these simulation test problems.
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Wu, Ling-Yu, and 吳舲雨. "A Study on Batch Order Policies in Manual Picking System of Distribution Center by Simulated Annealing." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/10436930879085411685.
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碩士<br>元智大學<br>工業工程與管理學系<br>96<br>Order picking is the core work in distribution center (DC) that behaves like the heart of the human. If we can reduce the operation time, it will increase the efficiency of the DC. Then, order picking policies play an important role in DC and the better planning can also reduce operation cost. Thus, this study integrated the order batching and two kinds of route planning method (Traversal Strategy and Largest Gap Strategy) to determine the initial solution in three kinds of warehouse configuration. In order to make optimal order picking decisions, we used simulated annealing (SA) to improve the initial solution and then try to find the optimum solution. Finally, we use SPSS statistical software to analyze how importance influence of the order picking distance in the different route planning problems or in the different warehouse design or in the different load limit. The results show that the factors of the exchange method are significant in solution efficiency and quality except that exchange the initial route planning method and load limit. We also found that the square warehouse has the shortest order picking distance, and the largest gap strategy had better performance in these simulation test problems, and when the load limit is 80 units that easy to find the shortest distance.
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Wu, Ming-Hung, and 吳銘泓. "The study of performance evaluation of order picking strategies with multi pickers in a manual warehouse." Thesis, 2008. http://ndltd.ncl.edu.tw/handle/34098284053467894827.
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博士<br>國立臺灣科技大學<br>工業管理系<br>97<br>Order picking is a key factor in managing a warehouse efficiently. Generally, there are three significant warehouse policies decisions that determine the efficiency of order picking, picking routing, storage assignment, order batching. Most of previous studies in picker-to-parts warehouse systems investigated only single-picker operations and are therefore adequate to evaluate order picking efficiency by travel distance as aisle congestion never takes place in such systems. In real world applications, the congestion inevitably occurs when a system has multiple pickers working together within the same region. This thesis presents an approximation method base on a GI/G/1 closed queueing network by using self-correcting approximation technique algorithm to evaluate the throughput of an order picking system with multiple pickers and aisle congestion considerations for different routing policies. The results generated by the proposed method are compared and validated via simulation model using eM-plant simulator. The result indicates that the approximation method appears to be sufficiently accurate for practical purposes. The sensitivity analysis of the throughput with respect to order sizes and number of pickers are conducted and the performance of different item storage policies are also evaluated using the proposed approximation model. Moreover, the pick-and-pass system plays an increasingly important role because of the growth of e-commerce and time-based competition. This thesis develops an analytical model for the pick-and-pass system by describing the operation of a picker as a Markov Chain for the estimation of the expected distance traveled of the picker in a picking line. Based on the proposed analytical model, this thesis derives properties of storage assignment and proposes three algorithms that optimally allocate items to storages for the cases of a single picking zone, a picking line with unequal-sized zones, and a picking line with equal-sized zones in a pick-and-pass system.
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Huang, Chien-Hsing, and 黃建興. "Applying Harmony Search to Solve the Multi-Cross Aisle with Batch Order Policies in Manual Picking Problem." Thesis, 2011. http://ndltd.ncl.edu.tw/handle/01499000224307940796.
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碩士<br>元智大學<br>工業工程與管理學系<br>99<br>The order picking is one of the important and complicated operations in a distribution center. On the average, the order picking time accounts for 30%~40% of total operation time in the distribution center. Hence, a well planned order picking strategy will reduce the operating cost, manpower and time of the distribution center effectively. Former researches in the order picking problem are focused on the single order or batch order picking policies. However, fewer of them are concerned about the number of cross-aisles in the search of solution quality. This study aimed to apply the Harmony Search (HS) to improve the batch order quantity of the initial solutions with the objective of minimum order picking travel distance. This study also added in multi-cross aisle design (with 0, 1, 3, 4) and used three seed order selection strategies (Random, Smallest Number of Picking Locations, and Smallest Rectangular Covering Area) combined with three accompanying order selection Strategies (Random, Smallest Number of Additional Picking Aisles, and Shortest Average Mutual Nearest Rectangular Distance) to determine the initial solutions with three route planning methods (Traversal, Largest Gap, and Combined). Then, we applied HS to improve the initial solutions for these test problems. The computational performances of each combined method were tested by the statistical software MINITAB. The results showed that order batching methods had no statistical significance on the performances, and the order picking travel distance achieved optimally with the cross aisle quantity equaled to three. Besides, this study also compared with Particle Swam Optimization (PSO) method, the computational results showed that the performances of HS outperformed PSO.
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Rodriguez, Arlene. "“In order to form a more perfect union”: Interethnic /interracial romances, unions, and nation formation in Helen Hunt Jackson, María Amparo Ruiz de Burton, Elizabeth Van Deusen, and Manuel Zeno Gandía." 2004. https://scholarworks.umass.edu/dissertations/AAI3152740.
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In the context of American imperialism, what role does the interracial/interethnic literary romance play? Do these romances offer the possibility of integrating politically disparate elements, or do these literary unions reveal the conflicts of nation-building at a time of territorial expansion? Drawing upon Doris Sommer's work on heterosexual romances and Robert McKee Irwin's work on homosocial bonds and both authors studies on nation-formation in Latin America, I explore interethnic/interracial unions in works by American and Latino writers and analyze the role these fictional romances and unions serve in representing the inclusion of new peoples and the formation of American national identity at the time of territorial expansion. The texts examined include Helen Hunt Jackson's Ramona, María Amparo Ruiz de Burton's The Squatter and the Don, Elizabeth Van Deusen's collection short story readers, Stories of Porto Rico and Tropical Tales (Porto Rico) and Manuel Zeno Gandía's Redentores. Through their use of the interracial/interethnic romance and unions, I argue that these writers reveal the complications of the larger geopolitical unions being constructed by the United States in the second half of the nineteenth century and early part of the twentieth century. These texts show the potentially subversive power that love, the romance trope, and related themes and homosocial bonds may have in a genre that traditionally emphasizes unions; in addition these works demonstrate that in unions—whether romantic or political—tensions will always persist. Lastly, these texts also demonstrate the frailty of using the nation-as-lovers as the emblematic trope of a nation that will hold within it multiple unions. Issues discussed include how romance is constructed, including the allusions, metaphors, plot devices, and motifs incorporated to tell the story of that romance; representation of these unions in light of United States' anti-miscegenation laws; the construction of consent; education and the lessons of domesticity.