This paper represents a technique for finding optimal paths with multiple indexes in a graph. Up to the present time, all optimal paths have been determined upon one index, say, distance for which an evaluation method exists. In this paper firstly we define multiple indexes for each edge in such a way that anyone can treat the factor for assigning an optimal path. Here, we use Data Envelopment ...

although public policy analysis is essential for public policy systems, the lack of public policy analysis is one of the most important problems of public policy making system in iran. thus, this research implemented to achieve a model for analyzing public policies, using multiple grounded theory method, to create theories and models compatible with the country`s conditions. for this purpose, p...

There are many benefits for coordination of multiple suppliers when single supplier cannot satisfy buyer demands.  In addition, buyer needs to purchase multiple items in a real supply chain. So, a model that satisfies these requests has many advantages. We extend the existing approaches in the literature that assume all suppliers need to be put on a common replenishment cycle and each supplier ...