基于重要度的民机备件单级初始库存优化配置

To investigate the influence of importance degree on inventory allocation of spare parts for civil aircraft, the single-echelon initial inventory optimal allocation model was established on basis of the theory of Boeing and Airbus models. And the decomposed-coordinated marginal analysis method was proposed in combination with the marginal analysis method to implement inventory optimal allocation for expendable, rotable and repairable parts. Firstly, the procedure of single-echelon initial inventory optimal allocation for spare parts was elaborated under considering importance degree. Secondly, the initial inventory optimal allocation model with fleet availability as an optimal objective, the costs of spare parts and the support probability as constraints were constructed. Thirdly, the decomposed-coordinated marginal analysis method was applied to accomplish the solution of the single-echelon initial inventory optimal allocation model of spare parts. Lastly, the spare parts of civil aircraft door system as a study object, initial inventory optimal allocation of spare parts was finished. Through the analysis, the initial inventory optimal allocation for each spare part, the cost of 170684.61 dollars and the fleet availability 0.9999 are obtained in the condition of satisfying constraints. Through the comparison of traditional inventory optimal allocation of spare parts, the developed method with importance degree is validated to be feasible and effective.