Sequencing JIT Mixed-Model Assembly Lines Under Station-Load and Part-Usage Constraints

Management Science · 2001 · Volume 47 · Issue 3

Abstract

This paper deals with two most important problems, from both practical and theoretical standpoints, arising in sequencing mixed-model assembly lines. Such lines have become core components of modern repetitive manufacturing, and just-in-time (JIT) manufacturing in particular. One problem is to keep the usage rate of all parts fed into the final assembly as constant as possible (the “level-scheduling problem”), while the other is to keep the line's workstation loads as constant as possible (the “car-sequencing problem”). In this paper the combined problem is formulated as a single-integer programming model. The LP-relaxation of this model is solved by column-generation techniques. The results of an experimental evaluation show that the lower bounds are tight.

Keywords

Mixed-model Assembly Lines, Just-in-Time Production, Station-Load/Part-Usage Constraints, Set Partitioning/Column Generation

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