Optimal design of a leased vehicle fleet with consideration of maintenance and environmental constraints

In this paper, we are interested in designing a fleet of vehicles made of two types (fuel and electric), which will be leased to achieve a set of transportation missions during a maximum period of time. A mathematical model is developed in order to determine the number of vehicles of each type to be leased, the number of months of use of each vehicle and the preventive maintenance period for each one. The objective is to minimize the expected total cost including leasing, operation, preventive and corrective maintenance, and environmental impact. An illustrative example is provided and numerical results are presented and discussed.