“In a certain sense human activity systems do not exist, only perceptions of them exist, perceptions which are associated with specific Ws.”

— Peter Checkland

Source: Systems Thinking, Systems Practice, 1981, p. 219 as cited in: Robert L. Flood, Norma R.A. Romm (1997) Critical Systems Thinking. p. 206

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Peter Checkland 10

British management scientist 1930

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