Modeling a Four-echelon Supply Chain Network under Disruption by Scenario-based Approach

The supply chain is a complex logistics system. In this chain, the raw material is converted to the final product and is provided to the end consume. The strong competition in today s global markets and huge customer attention to factors such as price, quality, time of delivery and product variety has caused the investors to focus on supply chain management. In this regard, selecting the choosing and determining the quota of each echelon of chain is one of the most important and crucial decisions. This paper aims at designing a four-echelon supply chain structure including multiple suppliers, multiple producers, multiple distributors and multiple customers for determining the optimal order of each product in a multi-objective and multi-period problem. The considered multiple objective functions include minimizing total purchase, transportation costs, shortage cost and holding cost, also maximizing total score of each one. Due to the importance of each level, the model has investigated synchronic for all of them. Also with regard to unreliable situation in real world, this model investigates by scenario-based approach.

کلیدواژه ها:

Production–distribution ، Reliability ، Quota allocation ، Scenario-Based ، Supply chain