One of the important centers among the health facilities is the centers of blood donations. Blood donors may not be able to donate because of the long distance between blood donation centers and their location. In this article, a dynamic hierarchical location-allocation model with fuzzy...

In this paper, we review competitive location models. Retail facilities operate in a competitive environment with an objective of profit and market share maximization. These facilities are different from each other in their overall attractiveness to consumers. The basic problem is the optimal...

In this paper, we review competitive location models. Retail facilities operate in a competitive environment with an objective of profit and market share maximization. These facilities are different from each other in their overall attractiveness to consumers. The basic problem is the optimal...