This paper considers the problem of evaluating and benchmarking process design configuration in a multi-station assembly process. We focus on the unique challenges brought by the multi-station system, namely, (1) a system level model to characterize the variation propagation in the entire process, and (2) the necessity to describe the system response to variation inputs at both global (system level) and local (station level and single fixture level) scales. State space representation is employed to recursively describe the propagation of variation in such a multi-station process, incorporating process design information such as fixture locating layout at individual stations and station-to-station locating layout change. Following the sensitivity analysis in control theory, a group of hierarchical sensitivity indices is defined and expressed in terms of the system matrices in the state space model, which are determined by the given process design configuration. Implication of these indices with respect to variation control is discussed and a three-step procedure of applying the sensitivity indices for selecting a better design and prioritizing the critical station/fixture is presented. We illustrate the proposed method using the group of sensitivity indices in design evaluation of the assembly process of an SUV (Sport Utility Vehicle) side panel.
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September 2002
Technical Papers
Design Evaluation of Multi-station Assembly Processes by Using State Space Approach
Yu Ding,
Yu Ding
Dept. of Industrial Engineering, Texas A&M University, College Station, TX 77843-3131
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Dariusz Ceglarek,
Dariusz Ceglarek
Dept. of Industrial Engineering, University of Wisconsin-Madison, Madison, WI 53706
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Jianjun Shi
Jianjun Shi
Dept. of Industrial and Operations Engineering, The University of Michigan, Ann Arbor, MI 48109
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Yu Ding
Dept. of Industrial Engineering, Texas A&M University, College Station, TX 77843-3131
Dariusz Ceglarek
Dept. of Industrial Engineering, University of Wisconsin-Madison, Madison, WI 53706
Jianjun Shi
Dept. of Industrial and Operations Engineering, The University of Michigan, Ann Arbor, MI 48109
Contributed by the Design Theory and Methodology Committee for publication in the JOURNAL OF MECHANICAL DESIGN. Manuscript received May 2000. Associate Editor: J. Cagan.
J. Mech. Des. Sep 2002, 124(3): 408-418 (11 pages)
Published Online: August 6, 2002
Article history
Received:
May 1, 2000
Online:
August 6, 2002
Citation
Ding, Y., Ceglarek, D., and Shi, J. (August 6, 2002). "Design Evaluation of Multi-station Assembly Processes by Using State Space Approach ." ASME. J. Mech. Des. September 2002; 124(3): 408–418. https://doi.org/10.1115/1.1485744
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