Proposing an assignment mathematical model in assembly line manufacturing system with considering human factors' role in product quality

Customers' desires and requirements are increased day to day. Manufacturing companies should adapt themselves to them as soon as possible to survive in the global market. Therefore they looking for a way to decrease their costs. In addition, customers want products with the best quality. Therefore quality should be considered too. This article is tried to identify different human factors which have effects on human performance and as a result, quality of products. In the following, these factors are integrated with worker assignment in a defined assembly line. The proposed model is a multi-objective linear mathematical model that is solved with augmented ∊-constraint method and GAMS solver software. In continuous, some computational examples are presented to test this method. As results, it can be mentioned that always there is a pay-off table between costs and quality. It means that there is a conflict between them. So it's up to decision maker to choose the best solution based on situations.