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.
The most fundamental definition of a quality product is one that meets the expectations of the customer. However, even this definition is too high level to be considered adequate. In order to develop a more complete definition of quality, we must consider some of the key dimensions of a quality product or service.erception is reality. The product or service may possess adequate or even superior dimensions of quality, but still fall victim to negative customer or public perceptions. As an example, a high quality product may get the reputation for being low quality based on poor service by installation or field technicians.