A model for the integration of production-distribution levels in the supply chain of non-perishable materials by considering intermediate warehouses

• Published in: Mudīrīyyat-i tawlīd va ʻamalīyyāt 2019-09, Vol.10 (2), p.37-53
• Main Authors: Kayvan Ahmadi, Sohrab Abdollahzadeh
• Format: Article
• Language: per
• Subjects: integration of production-distribution sectors; optimization; perishable materials; supply chain
• ISSN: 2251-6409; 2423-6950
• DOI: 10.22108/jpom.2019.115071.1180

This research presents a mathematical model for information integrating manufacturers, distributors, and intermediate warehouses and transportation systems in the supply chain over multi period. Goods are spoilable and Capacity, production costs, warehousing costs and transportation of each transportation systems costs are limited. Rate of corruption of goods in the warehouse and transportation systems is known or predictable by experts. The amount of demand for goods is constant. The objective function of the proposed model is single-objective and the costs of production, transportation, warehousing, corruption, shortage and unpackaged goods are integrated minimally. The proposed model is non-linear and of a strict type and has been confirmed by solving a few small-scale problems. For validation, a case study was performed and genetic Meta heuristic algorithms were used for solving the problem. The results of the solved model showed that Decision making integrated is better than the case that sections are decided separately. Introduction: One of the most important issues in supply chain is integrated production-distribution planning. Integration of two production-distribution and three-supply, production and distribution loops are important optimization issues in the supply chain. Research in this area involves locating new or special facilities and a combination of allocation locating. The current research is a type of allocation and examines the impact of supply chain integration with several manufacturers, warehouses and distributors and the transportation system. The goods in this chain are perishable and with a lifetime limitation. Production capacity, warehouses, and transportation systems are limited. The mathematical model developed is single-purpose and minimizes the cost of the whole chain. For the first time in the current study, distributor middle warehouses have been modeled taking into account corruption in the warehouse and during shipping. The proposed model is solved once considering the cost of corruption and once without it and the results are compared.   Methodology/Approach: In this study, a single-objective model is presented for the integrated production-distribution problem considering the lifetime limitation of the goods. The supply chain in question consists of three levels of manufacturers, distribution centers, and end customers. The model is offered for several product types over multiple time periods. The integrated problem-s