Soft Systems Methodology (glossary)
Soft systems methodology (SSM) formalizes the ideas of a soft system approach using systemic thinking to expose the issues in a problem situation and guide interventions to reduce them. SSM provides a framework of ideas and models to help guide participants through this systemic thinking. (Checkland 1999)
Checkland, P.B. 1999. Systems Thinking, Systems Practice. Chichester, UK: John Wiley & Sons Ltd.
SSM is the most common example for a Problem Structuring Approach, see the Systems Science knowledge area for details.