This study tries to propose and solve a model for VRP based on distributor’s satisfaction and balance distributed goods by vehicles regarding to their capacities. Assume that the distributor’s income depends on the production sales amount, therefore when the customers’ demands exceed the specified amount of L, minimum satisfaction level of distribution, the distributor is willing to distribute that product. On the other hand, when customers’ demand reaching the specified amount of U, the distributors’ maximum satisfaction level is reached; thus more distribution income from would not cause additional satisfaction for the distributor. Figure 1 show the distributor’s satisfaction based on income.
Diagram of distributor’s satisfaction level versus income level