Document Type: Research Paper
Department of Mathematics, Robat Karim Branch, Islamic Azad University, Robat Karim, Iran.
A three-level relief chain including a number of suppliers in fixed locations, candidate distribution centers and affected areas at certain points are considered. A mixed integer nonlinear programming model is proposed for open transportation location routing problem by considering split delivery of demand. To solve a realistic problem, foregoing parameters are considered as fuzzy in our proposed mode and for the problem of the proposed model, fuzzy multi-objective planning used.