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ACTA AERONAUTICAET ASTRONAUTICA SINICA ›› 2015, Vol. 36 ›› Issue (4): 1185-1194.doi: 10.7527/S1000-6893.2014.0262

• Solid Mechanics and Vehicle Conceptual Design • Previous Articles     Next Articles

Inventory control of multi-echelon maintenance supply system with multiple repair priorities

XU Li1, LI Qingmin2, LI Hua1   

  1. 1. Department of Weaponry Engineering, Naval University of Engineering, Wuhan 430033, China;
    2. Office of Research and Development, Naval University of Engineering, Wuhan 430033, China
  • Received:2014-05-29 Revised:2014-09-16 Online:2015-04-15 Published:2014-09-22
  • Supported by:

    National Defense Pre-research Foundation (51304010206, 51327020105)

Abstract:

The preparation of spare parts is closely related to the maintenance mechanism during the process of maintenance and support. Based on the traditional VARI-METRIC model, the assumption for infinite repair channel and first-come first-served service is relaxed. Considering the influence of multiple repair priorities for failure parts during the maintenance process, the computational model for average time is modified according to queuing system theory and the multi-echelon multi-indenture initial stock distribution model under repair priorities is established. The goal function for priority assignment is proposed and then the priority assignment project for each support site is optimized by intelligent optimization algorithm. Based on this, the spare parts' inventory is optimized by marginal analysis algorithm. Consequently, the method of sequential priority assignment and stock optimization is proposed and then algorithm complexity is carried out. In a given example, a proper priority setting may lead to a significant reduction in the inventory investment required to attain the system support efficiency; the proposed sequential optimization method can significantly reduce the computation time when the accuracy is achieved. The proposed model and optimization method have a strong sense for equipment support staff to develop rational support programs.

Key words: multi-echelon maintenance supply, multiple repair priorities, spare parts, VARI-METRIC model, support effectiveness, intelligent optimization algorithm, margin optimization

CLC Number: