OPTIMAL CONTROL OF AN ENVIRONMENT CONSCIOUS MANUFACTRUING SYSTEM WITH STOCHASTIC DEMAND
This paper deals with an environment conscious manufacturing control problem with consideration for returned product quality. The system includes the flow of the product return from customers to the factory as well as the forward flow of the sales. It is regarded as one of the optimal production control models such as a remanufacturing system with stochastic variability stemming from customer demand. Here we formulate the acquisition model with consideration for product quality under stochastic demand using a Markov decision process (MDP). We consider a single process that produces a single item product. The finished products are stocked in the factory and are used to fulfill customer demand. The product is produced using a returned product that belongs to either type of different quality classes that is class 1 or class 2. The system is composed of the state that denotes the inventory levels of two quality levels of the returned products, the transition probabilities between states under a policy and the costs associated with the transitions. In this model, we control to order the numbers of two types of returned products: one is the high quality product for the remanufacturing, class 1 whereas the other is the less quality level product, class 2. We also consider the priority for the use of the two types of products. Using the Markov decision model, we can obtain the optimal ordering policy that minimizes the expected average cost per period. Numerical examples are considered to illustrate the property of the control policy.
Optimal control Environment conscious manufacturing system Markov Decision Process
Kenichi NAKASHIMA Mitsutoshi KOJIMA
Department of Technology Management, Osaka Institute of Technology,5-16-1 Omiya Asahi-ku, Osaka, 535 Department of Civil Engineering and Systems Management, Nagoya Institute of Technology,Gokiso-cho,Sh
国际会议
上海
英文
1-4
2009-08-02（万方平台首次上网日期，不代表论文的发表时间）