ACTA AERONAUTICAET ASTRONAUTICA SINICA >
Initial Spare Allocation Method for k/N(G) Structure System
Received date: 2013-06-07
Revised date: 2013-09-16
Online published: 2013-09-27
Supported by
Ministry Level Project
There are two problems in traditional spare part redundancy model. One is the illogical use of infinite calling population assumption. The other is the difficulty in computing system supply availability. In order to solve these problems, an initial spare allocation method for k/N(G) structure system is presented in this paper. Firstly, the finite source queuing theory is used to obtain backorders distribution probability of spare parts. Secondly, a scheme is established to compute the k/N(G) structure system supply availability. Rationality of the proposed scheme is proved. Probability of a randomly chosen system will not be down due to spare parts backorders being estimated, and the whole k/N(G) structure system supply availability is approximated by the binomial distribution probability that k or more systems are mission capable. Finally, the marginal analysis method is used to optimize spare parts inventory in the k/N(G) structure system. Examples show that compared to the single item method, the proposed method can achieve the same supply availability target by paying less money.
Key words： redundancy; spare parts; queues; binomial distribution; availability; marginal analysis
LU Lei , YANG Jiangping . Initial Spare Allocation Method for k/N(G) Structure System[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2014 , 35(3) : 773 -779 . DOI: 10.7527/S1000-6893.2013.0393
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