Supplier evaluation and selection is arguably one of the most critical functions for the success of an organization. The main goal of supplier selection plan is to identify vendors with the best efficiency in delivering material on a real and just time. Many studies illustrated that producers were strongly needed to high quality materials in the time of producing, but lag time of deliver caused to delay in manufacturing goods, and customers lost .Thus, evaluating and selecting appropriate supplier is one of the critical tasksfor all of the manufactures. Several approaches exist in the literature to evaluate suppliers objectively, including analytic hierarchy process (AHP), total cost of Owner ship (TCO) and FUZZY. In this paper, they are compared by concentrating on their features. In addition, the paper explains AHP for a framework to cope with multiple criteria situations involving supplier selection, the " TCO" as a methodology and philosophy, which look beyond just the price of a purchase to better understanding and managing costs in selecting and maintaining relationships with suppliers and FUZZY method has a duty to contribute in the problem solution with representing vague data. In many studies those techniques are explained as three ways of assessing of suppliers in the best possible performance used by companies in the process of selection. We compare them for better enlighten with their formula .Consequently, the paper shows a model to combine AHP and FUZZY as FUZZY AHP method as an optimal method to evaluate suppliers.
