MRP parameter evaluation under fuzzy lead times

One of the main problems in supply chains is the supply planning of an actor (customer) in function of others network actors (suppliers). In this context, the knowledge of the supplier lead times uncertainty is essential in the client’s risk management process. In this article we are particularly interested in the management of risks by an actor responsible of assembly activity. We suppose that each supplier is able to give his uncertain lead time by the meaning of intervals. In this collaborative context, we search to determine robust assembly process. In this study, we treat the case of a single-product and regular launches of the assembly. For this, we will propose a method based on MIP formulation and relaxation constraints approach to determine robust optimal suppliers’ lead times which minimize the both risk of assembly delay and storage of components.