Crosby

Phil crosby introduced the philosophy of Zero defects.

Crosby's response to the quality crisis was the principle of "doing it right the first time" (DIRTFT). He would also include four major principles:

1. quality is conformance to requirements
2. the management system is prevention
3. the performance standard is zero defects
4. the measurement system is the cost of quality

Crosby's prescription for quality improvement was a 14 step program. His belief was that a company that established a quality program will see savings more than pay off the cost of the quality program ("quality is free").

Souce: Wikipedia