Why use inspections

Any efforts are expected without waste to be turned into contribution to increase quality, productivity, and customer satisfaction. However, basically it is the cost of doing things over, possibly several times, until the things are done correctly. In addition, the costs of lost time, lost productivity, lost customers, and lost business are real costs because of no return on them. The cost of quality, however, is not such a negative cost. Experience with inspections shows that time added to the development cycle to accommodate the inspection process is more than gained back in the testing and manufacturing cycles, and in the cost of redevelopment that doesn't need to be done [STRAUSS].