Concept Tree Technique

Scenario Let s say we want to improve our company s image. We have a few broad ideas along these lines, but we can use the Concept Tree technique to generate many actionable ideas. 

On a white board or flip chart, write the JTBD (see Jobs to Be Done, Technique 1). In our example, we are tasked with the rather broad job of improving the company s image. We could use Job Scoping (Technique 7) or Nine Windows (Technique 6) to better define this job, but since we have a few general ideas for meeting this JTBD, let s see where Concept Tree takes us. 

Fussell, J.B. Fault Tree Analysis Concepts and Techniques", Generic Techniques in System Reliability Assessment, 1976... 

Toward the end of the Second World War, systems techniques such as fault tree analysis were introduced in order to predict the reliability and performance of military airplanes and missiles. The use of such techniques led to the formalization of the concept of probabilistic risk assessment (PRA). The publication of the Reactor Safety Study (NRC, 1975)—often referred to as the Rasmussen Report after the name of principal author, or by its subtitle WASH 1400—demonstrated the use of such techniques in the fledgling nuclear power business. Although WASH 1400 has since been supplanted by more advanced analysis techniques, the report was groundbreaking in its approach to system safety. 

These concepts, which are described in detail by Ericson in Hazard Analysis Techniques for System Safety , help prevent the analyst from jumping ahead and missing the required detail to methodically develop the tree. 

Management oversight risk tree (MORT) A formal, disciplined logic or decision tree to relate and integrate a wide variety of safety concepts systematically. As an accident analysis technique, it focuses on three main con-... 

System behavior analysis and prognosis can be executed by means of various procedures. The procedures generally described in the literature can be traced back to three standard types, namely failure effect analysis [4-9], fault tree analysis [4-10], and incident progression analysis [4-11], The three procedures will be discussed, as well as the concept of the decision table technique, which is also a good tool but has rarely been discussed in the literature in connection with this application. To begin, the customary analysis techniques [4-9], [4-10], [4-11] will be discussed in alphabetical order. This will serve to delineate and distinguish the procedures. 

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