Izvorni znanstveni članak
Incorporating machine reliability issue and backlogging into the EMQ model - Part II: Random breakdown occurring in inventory piling time
Singa Wang Chiu
; Department of Business Administration, Chaoyang University of Technology, Gifong East Road, Wufong, Taichung 413, TAIWAN
Yuan-Shyi Peter Chiu
; Department of Industrial Engineering, Chaoyang University of Technology, Jifong East Road, Wufong, Taichung 413, TAIWAN
Hsien-Ju Chuang
; Department of Industrial Engineering, Chaoyang University of Technology, Jifong East Road, Wufong, Taichung 413, TAIWAN
Chien-Hua Lee
; Department of Industrial Engineering, Chaoyang University of Technology, Jifong East Road, Wufong, Taichung 413, TAIWAN
Sažetak
This paper presents the second part of a research which is concerned with incorporating machine reliability issues and backlogging into the economic manufacturing quantity (EMQ) model. It may be noted that in a production system when back-ordering is permitted, a random machine failure can take place in either backorder filling stage or in on-hand inventory piling time. The first part of the research investigates the effect of a machine failure occurring in backorder filling stage on the optimal lot-size; while this paper (the second part of the research) studies the effect of random breakdown happening in inventory piling time on the optimal batch size for such an imperfect EMQ model. The objective is to determine the optimal replenishment lot-size that minimizes the overall productioninventory costs. Mathematical modelling is used and the renewal reward theorem is employed to cope with the
variable cycle length. Hessian matrix equations are utilized to prove convexity of the cost function. Then, the optimal lot size for such a real-life imperfect manufacturing system is derived. Practitioners and managers in the field can adopt these replenishment policies to establish their own robust production plan accordingly.
Ključne riječi
manufacturing; machine breakdown; EMQ model; rework; production; lot sizing; scrap; random defective rate
Hrčak ID:
185757
URI
Datum izdavanja:
4.5.2011.
Posjeta: 327 *