Service quality can be related to service potential (for example, worker's qualifications); service process (for example, the quickness of service) & service result Cost area, Description, Examples. Costs of control (Costs of conformance), Prevention costs, Arise from efforts to keep defects from occurring at all. Quality Examples of credence goods include; relationship between price & demand, similar to Veblen goods, when price is the only possible indicator of quality.For example the transition from a solid state to liquid may only involve a very small addition of energy. Methods of evaluating energy quality are sometimes