“To us, analysis is the study of a problem domain, leading to a specification of externally observable behavior; a complete, consistent, and feasible statement of what is needed; a coverage of both functional and quantified operational characteristics”

—  Ed Yourdon

e.g. reliability, availability, performance
Source: Object-oriented design (1991), p. 18.

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American software engineer and pioneer in the software engi… 1944–2016

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