How well performs your supplier? This is the question! Sometimes he can cause you a real headache; Telling you stories that you have already heard, making excuses, making stupid mistakes, and frankly, you really don't know why you take trouble with him at all. You pay a lot of money every year and still… Maybe you are right. Maybe you are wrong. In order to determine you need to evaluate him. You must evaluate the important parameters regarding to the supplied product. In this article I will review the ISO 9001 Standard requirements for purchasing evaluation as introduced in chapter 7.4 - Purchasing. The review is very Simple, with no round and round.