Читать книгу System Reliability Theory - Marvin Rausand - Страница 31

The totality of features and characteristics of a product or service that bear on its ability to satisfy stated or implied needs.

Quality is sometimes defined as conformity to specifications and a quality defect is referred to as a nonconformity. According to common usage, quality denotes the conformity of the item to its specification as manufactured, whereas reliability denotes its ability to continue to comply with its specification over its useful life. With this interpretation, reliability may be considered as an extension of quality into the time domain.