What is cost of quality?

Cost of Quality includes:

• Includes all costs incurred in the pursuit of quality or perform quality related work.

• It is more than 50% of the total project cost

There are three types of cost
Prevention cost: It is  incurred to prevent defects from occurring.
Appraisal cost: It is  incurred for reviewing and testing the work product.
Failure cost:It is the cost  incurred in correcting the defects found during appraisals or reported by the customer.