Difficulty in Controlling Quality
A manufacturing company can inspect its products before they are shipped to the consumer, and their quality can be measured visually or with instruments (tolerances, purity, weight, color, and so on). A service company cannot judge product quality until the moment the service is rendered, and then the judgments are often subjective. Restaurant management can examine the food in the kitchen, but customer satisfaction depends to a considerable extent on the way it is served. The quality of education is so defficult to measure that few educational organizations have a formal quality control system.