Soft Systems Methodology (SSM) stages 5 – 7

Stage 5 – Conceptual Models compared to problem expression and Root Definitions. Stages 2 – 5 reiterated if there are differences until Root Definition agrees with Conceptual Model. Differences likely between Root Definition and Conceptual Model due to more analysis being carried out in development of Conceptual Model. Stage 6 – Identify the feasible and desirable changes by comparing the […]

Soft Systems Methodology (SSM) stages 1 – 4

Methodology supporting Soft Systems analysis developed by Checkland. Seven stages: The Problem Situation The Problem Situation expressed Root Definitions of relevant systems Building Conceptual Models Comparison of the expressed Problem Situation and the Conceptual Models Feasible and desired changes Action to improve the situation Stages 1 & 2 – obtaining rich expression of problem situation, creation of rich pictures. Stage […]

Further Model Types and their uses

Rich Pictures Often first stage in design process Free format diagram to capture system Identifies politics, processes, emotions Theme places in middle, link words placed around it Systems Dynamics Show states and rates for given situation Example: human population and rate of increase/decrease Other states can be modelled against human population such as food consumption, food production, water consumption Allows […]

A framework for models

Many different types of models but Ackkoff (1962) proposes three categories: iconic model – expected to behave same as real thing. e.g. scale model of ship or model aircraft in wind tunnel. analogue model – attempt to simulate behaviour without necessarily replicating physical appearance. e.g. computer games like Forza and FIFA. analytical model – developed from mathematical or logical relationships […]