the system should be considered so that soft systems thinking, and Mumford’s needs can be achieved with the potential changes. These potential changes should not be acted on until step 7 but they should be feasible enough to act upon to improve the problem situation. Take action to improve the problem situation Two streams (1988) The two-stream model of SSM recognizes the crucially important role of history in human affairs, and for a given group of people their history determines what will be noticed as significant and how it will be judged. This expression of SSM is presented as an approach embodying not only a logic-based stream of analysis (via activity models) but also a cultural and political stream which enable judgements to be made about the accommodations between conflicting interests which might be reachable by the people concerned and which would enable action to be taken. This particular expression of SSM removes the dividing line between the world of the problem situation and the systems thinking world. Four main activities (1990) The four-activities model is iconic rather than descriptive and subsumes the cultural stream of analysis in the four activities. The four activities are: The seven stage model gave an approach which applies real world situations, both large and small and public and private sector. The four main activities were created as a way to capture the more flexible use of SSM and it used to include more of the cultural aspect of the workplace into the concept of SSM. The four activities are used to show that ssm does not have to be used rigidly; it's there to show real life and not be constrained. The four main activities should be seen as an individual concept rather than a descriptive which incorporates the cultural stream of analysis. Finding out about a problem situation, including culturally/politically Formulating some relevant purposeful activity models: Creating and drawing specific diagrammatic illustrations of activity processes that occur in an organisation, which shows the relevant processes that take place in a structured order, and depicts any problem situation visually by showing the flow of one action to another. An example of this would be a diagram of a Soft Systems Methodology method, which is a ‘Conceptual Model’, which is a representation of a systems’ human actions, or an ‘Architecture System Map’, which is a visual representation of the implementation of sections of a software