납기지연이 허락되는 상황 하에서 Push/Pull 생산시스템 선택을 위한 시뮬레이션적 접근

Abstract

Purpose: This study examines which production system considering delivery delay can decrease inventories under required service level, and give a simple and clear criterion to selection an optimal production system. The reason why we investigated this issue is that manufactures are often required to delay delivery time by customers who consider flexible progress in their works. As with the requirement of customers, the unexpected production restrictions from the outside force the manufacturers always groan under heavy financial and inventory burden. The discussion about how to analysis the effect of external factors on optimal production design and production system selection can be valuable and essential in management. Research design and methodology: We approached basically the expected inventory level and characteristics of production systems proposed by Nakatsuka et al. using Little's formula for formulation, and simulated the model with revised parameters. Results: We should note that it is possible to evaluate the optimal production system by comparison of the related parameters such as the expected delivery delay, fluctuation coefficient of the shipment, production lead-time and cycle. We found that if the delivery delay is getting bigger, the pull system is better, while if other parameters are getting bigger the push system is better. Conclusions: The push/pull production system with delivery delay and a criterion for the selection are mainly discussed in this study. The effects of delayed delivery time, production lead time, coefficient of shipment and production cycle time on selection of the push and pull production systems are also clarified.