Optimization of workcell layouts in mixed-model assembly line environment

Klampfl, Erica; Gusikhin, Oleg; Rossi, Giuseppe

doi:10.1007/s10696-007-9021-9

Cited by 7 publications

(7 citation statements)

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“…Recent representative papers on workforce assignment are Battaia et al (2015), Bruecker et al (2015), and Moreira et al (2017). An example of manufacturing cell design so that workforce efficiency is maximized can be found in Klampfl, Gusikhin, and Rossi (2005). The mathematical approaches in this literature are typically based on optimization (often mixed integer programming) combined with various heuristics (simulated annealing, Tabu search, genetic algorithms, swarm intelligence, etc.).…”

Section: Based On the Above The Class Of Mjp Systems Is Defined As Fmentioning

confidence: 99%

Multi-job production systems: definition, problems, and product-mix performance portrait of serial lines

Alavian

Denno

Meerkov

2017

International Journal of Production Research

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This paper pursues two goals: (a) Define a class of widely used in practice flexible manufacturing systems, referred to as Multi-Job Production (MJP) and formulate industrially motivated problems related to their performance. (b) Provide initial results concerning some of these problems pertaining to analysis of the throughput and bottlenecks of MJP serial lines as functions of the product-mix. In MJP systems, all job-types are processed by the same sequence of manufacturing operations, but with different processing time at some or all machines. To analyze MJP with unreliable machines, we introduce the work-based model of production systems, which is insensitive to whether single- or multi-job manufacturing takes place. Based on this model, we investigate the performance of MJP lines as a function of the product-mix. We show, in particular, that for the so-called conflicting jobs there exists a range of product-mixes, wherein the throughput of MJP is larger than that of any constituent job-type manufactured in a single-job regime. To characterize the global behavior of MJP lines, we introduce the Product-Mix Performance Portrait, which represents the system properties for all product-mixes and which can be used for operations management. Finally, we report the results of an application at an automotive assembly plant.

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Section: Based On the Above The Class Of Mjp Systems Is Defined As Fmentioning

confidence: 99%

Multi-job production systems: definition, problems, and product-mix performance portrait of serial lines

Alavian

Denno

Meerkov

2017

International Journal of Production Research

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“…We note that in the literature, there exist studies which explicitly model the finite return velocities. The interested reader can refer to the work by Klampfl et. al.…”

Section: ( )mentioning

confidence: 99%

Definition of spacing constraints for the car sequencing problem

Lesert

Alpan

Frein

et al. 2010

International Journal of Production Research

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International audienceCar sequencing problem deals with the ordering of a list of vehicles to be produced on an assembly line so that the overall capacity of each workstation is not exceeded. Some types of vehicles require several time consuming operations to be done on a workstation and will naturally overload that workstation. Such vehicles are spaced out in the sequence, by means of a set of spacing constraints, in order to cope with the momentary increase of workload that they create. Two questions arise: which type of vehicles should be subject to the spacing constraints and by which distance should they be spaced out in the sequence. In practice as well as in the car sequencing literature, there does not exist a methodical way to answer the first question and the existing methods for the second one is no longer adequate due to the increased diversity of cars produced in an assembly line. In this paper, we propose two new methods to answer these questions with a special emphasis on the first one. The performance of the proposed methods is illustrated using a real case study

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“…De acordo com Salveson (1955) e Wild (1972), a primeira linha de montagem foi introduzida por Eli Whitney durante a revolução francesa para produção de espingardas. Esse tipo de sistema produtivo foi popularizado por Henry Ford em 1913, quando desenvolveu a primeira linha de montagem com acionamento mecânico para a produção do automóvel Ford Modelo T (Duguay et al, 1997;Amen, 2001;Klampfl et al, 2005;. Através dessa concepção de sistema produtivo, Ford obteve ganhos significativos em termos de produtividade e redução de custos, aspectos fundamentais para atender o modelo de consumo existente na época, baseado na comercialização de produtos de baixo preço e com pouca variedade (Hounshell, 1984).…”

Section: Introductionunclassified

Linhas de montagem: revisão da literatura e oportunidades para pesquisas futuras

Silva

Tubino

Seibel

2014

Prod.

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Este artigo tem por objetivo identificar as principais características de pesquisa no tema linhas de montagem, a fim de propor oportunidades para trabalhos futuros. Para tanto, foram revisadas 226 publicações relevantes sobre o tema nos últimos 50 anos (1960-2010) e analisados os principais assuntos, métodos e conteúdos dos trabalhos estudados. Como resultado, observa-se uma concentração de publicações em balanceamento e sequenciamento de linhas de montagem através de métodos de modelagem e experimentos computacionais, além de significativa quantidade de estudos de linhas de modelos mistos, justificada pela crescente demanda por variedade e customização dos produtos. Existe um desafio para a pesquisa de linhas de montagem que é traduzir para os modelos gerados a complexidade dos aspectos reais do funcionamento e configurações das linhas de montagem existentes. Diversos autores enfatizam dificuldades para obter modelos aplicáveis em diversos casos e situações específicas da realidade. Os autores apontam que existem decisões estratégicas importantes para as configurações das linhas que antecedem a utilização dos modelos disponíveis. Conclui-se que há oportunidades para trabalhos científicos relacionados às pesquisas práticas e aplicadas que envolvam casos e problemas reais, além de para uma abordagem mais ampla do tema, considerando os aspectos multidisciplinares das linhas de montagem e seu relacionamento com as estratégias de produção adotadas pelas empresas.

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Optimization of workcell layouts in mixed-model assembly line environment

Abstract: Over the course of his career Mr. Rossi has been active in several areas of Theoretical and Computational Physics, Material Science and Operations Research both in academia and in industry. He has authored over 50 refereed publications and holds six US patents.

Cited by 7 publications

References 0 publications

Multi-job production systems: definition, problems, and product-mix performance portrait of serial lines

Multi-job production systems: definition, problems, and product-mix performance portrait of serial lines

Definition of spacing constraints for the car sequencing problem

Linhas de montagem: revisão da literatura e oportunidades para pesquisas futuras

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