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Research Papers

Condition-Based Maintenance Decision-Making for Multiple Machine Systems

[+] Author and Article Information
Saumil Ambani

Department of Mechanical Engineering, University of Michigan–Ann Arbor, 2300 Hayward Street, Ann Arbor, MI 48109-2136sambani@umich.edu

Lin Li1

Department of Mechanical Engineering, University of Michigan–Ann Arbor, 2300 Hayward Street, Ann Arbor, MI 48109-2136lilz@umich.edu

Jun Ni

Department of Mechanical Engineering, University of Michigan–Ann Arbor, 2300 Hayward Street, Ann Arbor, MI 48109-2136junni@umich.edu

1

Corresponding author.

J. Manuf. Sci. Eng 131(3), 031009 (May 05, 2009) (9 pages) doi:10.1115/1.3123339 History: Received September 01, 2008; Revised March 18, 2009; Published May 05, 2009

Maintenance decision-making has emerged as an important area of industrial research. Over the past two decades, maintenance policies have evolved from simple reactive maintenance to complex versions of condition-based maintenance (CBM). A quantitative description of a machine’s health, as found in CBM, is essential to plan maintenance effectively as it helps avoid excessive or insufficient maintenance. In spite of several advancements in the degradation monitoring techniques, most CBM decision-making methods still focus on a single machine system. Maintenance analysis of a single machine provides good insights, but lacks practical applications. In this paper, we develop a continuous time Markov chain degradation model and a cost model to quantify the effects of maintenance on a multiple machine system. An optimal maintenance policy for a multiple machine system in the absence of resource constraints is obtained. In the presence of resource constraints, two prioritization methods are proposed to obtain effective maintenance policies for a multiple machine system. A case study focusing on a section of an automotive assembly line is used to illustrate the effectiveness of the proposed method.

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Copyright © 2009 by American Society of Mechanical Engineers
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References

Figures

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Figure 2

Markov degradation model

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Figure 3

CTMC model for a single machine system

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Figure 7

Comparison of JΦ1, JΦ2, and JΦ3

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Figure 1

Evolution of maintenance policies

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Figure 4

Three-machine serial production line

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Figure 5

Comparison of policies for a single machine system

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Figure 6

First segment of the production line

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Figure 8

Comparison of JΦ′ 1, JΦ′ 2, and JΦ′ 3

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