手法を比較

	戦略的選択アプローチ	ソフトシステム方法論（SSM）
分野	問題構造化	問題構造化
系統	Process / pipeline	Process / pipeline
提唱年	2005	1981
提唱者	John Friend & Allen Hickling	Peter Checkland
種類	Iterative group-based problem structuring and decision process	Interpretive problem-structuring methodology
原典	Friend, J., & Hickling, A. (2005). Planning Under Pressure: The Strategic Choice Approach (3rd ed.). Elsevier. ISBN: 978-0-7506-6373-2	Checkland, P. (1981). Systems Thinking, Systems Practice. Wiley. ISBN: 978-0-471-27911-2
別名	SCA, Planning Under Pressure, Stratejik Seçim Yaklaşımı, Interactive Strategic Planning	SSM, Checkland's SSM, Soft Systems Analysis, Yumuşak Sistemler Metodolojisi
関連	2	3
概要	The Strategic Choice Approach (SCA) is an interactive, workshop-based problem structuring method developed by John Friend and Allen Hickling, first published in 1987 and refined in the definitive third edition of Planning Under Pressure (2005). SCA helps groups of planners and stakeholders manage interconnected decisions under uncertainty by explicitly mapping decision areas, option combinations, and sources of uncertainty before committing to action.	Soft Systems Methodology (SSM) is an interpretive, action-research approach for structuring and managing complex, ill-defined ('soft') problem situations involving human activity. Developed by Peter Checkland at Lancaster University throughout the 1970s and formally presented in 1981, SSM guides practitioners through iterative cycles of inquiry that move from an unstructured problem situation to purposeful action through structured learning rather than optimization.