POSIWID: The Purpose of a System Is What It Does

Daring Fireball
By John GruberAug 26, 2026, 4:18 pm233 ptsTrending
Wikipedia: The purpose of a system is what it does (POSIWID) is a heuristic in systems thinking coined by the British management consultant Stafford Beer, who stated that there is “no point in claiming that the purpose of a system is to do what it constantly fails to do”. It is used in systems theory, and is…

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