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The Integrated Importance Measure of Multi-State Coherent Systems for Maintenance Processes

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4 Author(s)
Shubin Si ; Ministry of Education Key Laboratory of Contemporary Design and Integrated Manufacturing Technology, School of Mechatronics, Northwestern Polytechnical University, Xi'an, China ; Hongyan Dui ; Zhiqiang Cai ; Shudong Sun

This paper mainly focuses on the integrated importance measure (IIM) of component states for maintenance processes. To describe the impact of each component state in maintenance processes, a maintenance cost function of multi-state systems is defined at first. Second, considering the probability distributions, transition rates of the component states, and system maintenance costs, the IIM of component states is described. The corresponding characteristics of the IIM of the component states are discussed in both series systems and parallel systems. Then the relationships between IIM and Griffith importance, Wu importance, mean absolute deviation, and multi-state redundancy importance measures are also discussed. At last, a numerical example is given to demonstrate the IIM of component states. The results show that IIM can be used to identify the most important component state for the maintenance decision.

Published in:

IEEE Transactions on Reliability  (Volume:61 ,  Issue: 2 )