会议专题

Evaluation of peaked lateral transshipment in inventory systems subject to a service constraint

This study deals with the spare optimization of a large logistics company, in charge of the maintenance of 38 Italian Airports. Strict requirements of equipment operational availability and long repairing times make necessary to maintain high stock levels of spare parts, thus involving high inventory costs. While a hierarchic inventory policy is currently applied,lateral transshipments deserve a high potential to reduce inventory levels. We investigate the potential benefits deriving from a single echelon policy with extensive use of lateral transshipments. The resulting model is a queueing network with zero buffer and peaked demand. The blocking probability of this network models the probability of spare part unavailability. We make use of three approximate analytical models to evaluate the blocking probability, and develop a heuristic procedure to determine the stock level for each item and each warehouse. Computational experiments, carried on with a detailed simulator of the network, show that the single-echelon policy allows to satisfy operational availability constraints with a significant reduction of spare stock levels with respect to the hierarchic policy.

Annalisa Cesaro Dario Pacciarelli

Dipartimento di Informatica e Automazione, Universit(a) Roma Tre, via della vasca navale, 79, Roma I-00146, ITALY

国际会议

2007 International Conference on Manufacturing & Service Operations Management(2007制造与服务运作管理国际学术会议)

北京

英文

2007-06-18(万方平台首次上网日期,不代表论文的发表时间)