A joint economic lot-sizing problem with fuzzy demand, defective items and environmental impacts

International Conference on Informatics, Technology and Engineering 2017

计算机科学

Jauhari, W.A.^1 ; Laksono, P.W.^1

Department of Industrial Engineering, Sebelas Maret University, Surakarta, Indonesia^1

关键词: Adjustable production rate;    Continuous review;    Continuous review policies;    Fuzzy demand;    Imperfect production;    Inventory;    Joint economic lot sizings;    Optimal order quantity;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/245/1/012018/pdf
DOI  :  10.1088/1757-899X/245/1/012018

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

In this paper, a joint economic lot-sizing problem consisting of a vendor and a buyer was proposed. A buyer ordered products from a vendor to fulfill end customer's demand. A produced a batch of products, and delivered it to the buyer. The production process in the vendor was imperfect and produced a number of defective products. Production rate was assumed to be adjustable to control the output of vendor's production. A continuous review policy was adopted by the buyer to manage his inventory level. In addition, an average annual demand was considered to be fuzzy rather than constant. The proposed model contributed to the current inventory literature by allowing the inclusion of fuzzy annual demand, imperfect production emission cost, and adjustable production rate. The proposed model also considered carbon emission cost which was resulted from the transportation activity. A mathematical model was developed for obtaining the optimal ordering quantity, safety factor and the number of deliveries so the joint total cost was minimized. Furthermore, an iterative procedure was suggested to determine the optimal solutions.