Journal
EUROPEAN JOURNAL OF OPERATIONAL RESEARCH
Volume 156, Issue 3, Pages 698-711Publisher
ELSEVIER
DOI: 10.1016/S0377-2217(03)00148-6
Keywords
productivity; manufacturing; integer programming
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The decision to move straight-line assembly systems to U-shaped assembly lines systems constitutes a major layout design change and investment for assembly operations. Proponents of the lean manufacturing and just-in-time philosophies assert that U-shaped assembly systems offer several benefits over traditional straight-line layouts including an improvement in labor productivity. This premise often serves as the fundamental reason why firms consider transforming their assembly systems from traditional straight-lines to U-shaped layouts. Surprisingly, little empirical or experimental data supports this assertion. The purpose of this research is to empirically confirm that U-shaped assembly lines improve labor productivity. Results indicate that labor productivity will improve significantly under certain conditions when switching from a straight-line layout to a U-shaped layout but not in all cases. The research also reveals some limitations of such a layout change when factors such as the number of tasks and cycle times are varied. (C) 2003 Elsevier B.V. All rights reserved.
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