Definitions
There are many different definitions of quality. For some it is the "capability of a software product to conform to requirements." (ISO/IEC 9001, commented by ) while for others it can be synonymous with "customer value" (Highsmith, 2002) or even defect level.
The first definition of quality History remembers is from Shewhart in the beginning of 20th century: There are two common aspects of quality: one of them has to do with the consideration of the quality of a thing as an objective reality independent of the existence of man. The other has to do with what we think, feel or sense as a result of the objective reality. In other words, there is a subjective side of quality. (Shewhart)
Read more about this topic: Software Quality Model
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