多级维修供应下不完全串件系统可用度评估

串件拼修能够在同等条件下最大限度提高装备可用度，但在装备组成结构中，并不是所有的项目都能够进行串件。为此，针对不完全串件系统，在多级维修供应模式下，根据串件拼修特点，结合可修复备件多级库存控制理论（multi-echelon theory for recoverable item control, METRIC）理论，建立了系统可用度评估模型，并研究了串件对策下最优备件方案确定流程。通过实验设计，对不同串件对策下装备的可用度进行评估，计算表明串件拼修能够进一步提高装备可用度。利用多级多层次备件库存优化工具（vary METRIC, VMETRIC)平台对模型进行验证，结果表明,本文模型结果与VMETRIC仿真结果非常吻合，证明了本文模型的正确性。

Evaluation of availability for incomplete cannibalization systems under multi-echelon maintenance supply

Cannibalization policy can improve the availability of equipment furthest,but not all units can use the method.Focusing on the incomplete cannibalization system,under the mode of multi-echelon maintenance supply,according to the characteristics of cannibalization and combining with multi-echelon theory for recoverable item control(METRIC) theory,the availability model of the incomplete cannibalization system is established and the analysis flow of the optimal spare parts’ project is researched.In a given example,the equipment availability is analyzed with different cannibalization policies,and the result proves the method is valid for the incomplete cannibalization system.The vary METRIC(VMETRIC) software is used to test the result,the verification shows that there are highly consistency between the two results,which proves the model’s correctness.