Fuzzy vehicle routing model with credibility measure and its hybrid intelligent algorithm

Vehicle routing problem is concerned with finding efficient routes, beginning and ending at a central depot, for a fleet of vehicles to serve a number of customers with demands for some commodity. This paper considers the vehicle routing problem in which the travel times are assumed to be fuzzy variables. A fuzzy optimization model is designed for fuzzy vehicle routing problem with time window. Moreover, fuzzy simulation and genetic algorithm are integrated to design a hybrid intelligent algorithm to solve the fuzzy vehicle routing model. Finally, a numerical example is given to show the effectiveness of the algorithm. (c) 2005 Published by Elsevier Inc.