A Multi-indentured Repairable Inventory System with Limited and Different Diagnostic Repair Resources  

作　　者：Fang Liu Jianyin Zhao Bo Guo 

机构地区：[1]System Engineering Institute, National University of Defense Technology, Changsha 410073, China

出　　处：《Journal of Systems Science and Information》2006年第3期455-466,共12页系统科学与信息学报（英文）

摘　　要：This paper describes the characteristics of a single-base repairable inventory system and multi-indenture structure with communality and redundancy. At the base, there are a working field that has a maximum of z equipment on line and its repair channels, which mainly consist of two centers： line replaceable units （LRUs） diagnostic center and shop replaceable units （SRUs） repair center. In these two centers, the resources are finite and different. We introduce routing probabilities to express the repair relationships between resources and failed replaced units. The diagnostic time follows exponential distribution and SRU repair time follows general distribution with known average. We analyze the general model of this system, and present an approximate solution that uses two-step negative binomial approximation to obtain the expected backorders of all LRUs. The first step is fitting negative binomial distributions to the distributions of the number for all SitUs at the repair center, and the second is fitting negative binomial distributions to the convolutions of the distributions of the number for all LRUs in diagnostic and assemblydelayed. Thus, we give the approximate value of operational awilability of equipment based on this method. Finally, the results under two policies of routing probabilities are compared by the optimal curves.

关 键 词：INVENTORY multi-indenture operational availability repairable system routing probability 

分 类 号：TP3[自动化与计算机技术—计算机科学与技术]