Systems analysis, conceived in a policy sciences framework, is the macro instrument of the systems manager for understanding, evaluating and improving human systems — which are defined as goal oriented interdependent units incorporating people, organization and some form of technology for control, administration or output.

Richard F. Ericson (1979) Improving the human condition: quality and stability in social systems : proceedings of the Silver Anniversary International Meeting, London, England, August 20-24, 1979. Society for General Systems Research. p. 621