Cost Of Poor Quality (COPQ): The charges associated with provision of inadequate quality item or facilities is called as cost of quality. There are four classes: inner failure expenses (costs associated with problems found before the client gets the item or service), exterior failure expenses (costs associated with problems found after the client gets the item or service), evaluation expenses (costs suffered to find the degree of conformance to high quality requirements) and protection expenses (costs suffered to keep failure and evaluation expenses to a minimum).
