Optimal integrated maintenance strategy for parallel leased machines with warranty periods

This paper deals with an integrated production/maintenance problem of a manufacturing system considering a warranty and leasing constraints. The lessor may provide warranty periods to encourage the lessee to sign a lease contract with a longer lease period. The problem consists in a several parallel machines that have to satisfy a random demand over a finite time horizon under given service level and taking into account the warranty periods. First of all, to obtain an economical production planning, we minimize the total production and inventory cost. Secondly, we determine the optimal maintenance strategy for different machines according to the obtained production plan. The key of this study is to show the impact of the length of warranty periods on the optimal maintenance strategy. An analytical study and a numerical example are presented in order to prove the developed approach.