The objective of most routing and scheduling problems is to minimize the total cost of providing the service. This includes vehicle capital costs, mileage, and personnel costs. But other objectives also may come into play, particularly in the public transport. For example, in school bus routing and scheduling, a typical objective is to minimize the total number of student-minutes on the bus. Thus, in the case of transportation services, an appropriate objective function considers more than the cost of delivering a service. The “subjective” costs associated with failing to provide adequate service to the customer must be considered as well. Table 2-1 shows the list of different objectives in vehicle scheduling problems