2001 Volume 13 Issue 3 Pages 313-321
In this paper we deal with a transportation problem in a housing material manufacturer. The housing material manufacturer entrusts transportation of its products to two forwarding agents which handle regular transportation and small lot transportation. There are two objectives of the housing material manufacturer : one is to minimize the transportation cost and the other is to minimize the opportunity loss with respect to transportation time. Each of the two forwarding agents assigns srivers the transformation tasks so as to maximize its profit. We formulate the transportation planning and work force assignment problem as a decentralized two-level integer programming problem. By applying interactive fuzzy programming, we derive a solution satisfactory not only to the housing material manufacturer but also to the two forwarding agents.