Quality

The exact definition of quality has changed a lot during the past:

• Joseph M. Juran “Suitable for use”
• Kuehn & Day 1962 “In the final analysis of the market, the quality of a product depends on how well it matches the patterns of consumer preferences”
• Gilmore 1974 “Quality i show much a specific product meets the needs of a specific consumer”
• Crosby 1979 “Quality means compliance with requirements”
• Broh 1982 “Quality is the degree of axcellence at an acceptable price and the control of variabilità at an acceptable cost”
• Price 1985 “Doing the right things the first time”
• ISO 9000 standard of 2000 (Fundamentals and Terminology) “Quality: capacity of a set of characteristics inherent to a product, system or process to comply with the requirements of customers and other interested parties”
• ISO 9000 standard of 2005 (Fundamentals and Terminology) “Quality: degree in which a set of intrinsic characteristics satisfy the requirements”