08/06/2026
□ Systems Analysis
Soft Systems Methodology (SSM)
Soft Systems Approach, which is appropriate when an agreement on the objective to be accomplished (‘What’) has not been reached among the interested parties or when a complex social event is being dealt with and the objective cannot be defined clearly, has seen various techniques developed since 1970’s. Among many soft approaches, the below describes Soft Systems Methodology (hereinafter SSM) developed by a British professor Peter Checkland, in particular.
The SSM is based on the basic premise that "the meaning of the social situation differs depending on the position", and was developed as an approach to explore meaning from a state in which various values are intertwined complicatedly. The accommodation as a key word, there is a thought that "Do not ask for unity of position and senses of values, the differences remain unchanged, adjusted according to each other, approaching an agreement" is included.
As the concept of SSM, Stage 1: Structure a Problem Situation, Stage 2: Select Relevant Systems, Stage 3: Prepare the Root Definition, Stage 4: Construct a Concept Model, Stage 5: Compare with the Real World , Stage 6: Create a Reform Plan, Stage 7: Execute a Reform Plan. (refer to Figure here posted).
Out of the above seven stages, the stages 1 to 5 can be labeled as a soft approach that clarifies ‘what needs to be done’ and the stages 6 and 7 are as a hard approach that explores ‘how it should be accomplished.’
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