SCM Approach to the Mixed-model Sequencing Problem

概要

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When determining the sequence of a mixed-model assembly line, the following two objectives are usually considered: (1) leveling the load (total assembly time) for each process within the assembly line, and (2) maintaining a constant rate of use of each part in the line. For the first objective, we usually determine the sequence that minimizes maximum work congestion. For the second objective, a sequence is selected in which the quantity used per hour (i.e. consumption speed) of each part in the mixed-model assembly line is kept as constant as possible. Some studies have considered these two objectives simultaneously. In this paper, from the standpoint of supply chain management (SCM), we propose a new sequencing method that considers not only the two aforementioned traditional objectives, but also a third objective, that is, shortening the delivery time to a dealer when the final products are delivered by car-carriers. We propose an approach utilizing a two-stage sequencing method. In Stage 1, to maintain a constant rate of parts usage and meet the date of delivery, we divide the production period into shorter periods, and determine the production volume of each product for each period. Next, in Stage 2, we establish a production schedule for each divided period that realizes smoother production in the assembly line. We display numerical examples to explain and clarify the effectiveness of the proposed sequencing procedure.
2010-08-15