The degree of acceptance is related to the importance, needs, of given categories of activities to the customer. The assumption is obvious – for the one customer who doesn’t need to do something in a given category of activities, every product will look acceptable for every work in this category. And the opposite is also true, if one needs and very often uses a product to execute given work, he or she will accept a product with high quality of the relevant properties needed for effective and efficient performance in accomplishing this work.