A sinkhole, also known as a cenote, sink, sink-hole, shakehole, swallet, swallow hole, or doline, is a depression or hole in the ground caused by some form of collapse of the surface layer. Most are caused by karst processesâfor example, the chemical dissolution of carbonate rocks or suffosion processes. Sinkholes vary in size from 1 to 600 m both in diameter and depth, and vary in form from soil-lined bowls to bedrock-edged chasms. Sinkholes may form gradually or suddenly, and are found ...
According to the Perceived Service Quality model (Figure 1), the quality of a service, as perceived by the customer, is the result of a comparison between the expectations of the customer and his or her real-life experiences.
Quality Improvement (see also Cummings, Phillips, Tilbrook and Lowe, this issue) is concerned with raising the quality of a product or service. The type of comparison that is made when engaged in quality improvement is between the current standard of a product or service and the standard being aimed for. Quality improvement is concerned with comparing the quality of what is about to be produced with the quality of what has been produced in the past.