Fitting Hierarchical Holographic Modeling (HHM) into the Theory of Scenario Structuring

A point of view is presented from which the Hierarchical Holographic Modeling (HHM) method of Y.Y. Haimes can be seen as a method for identifying risk scenarios. The key idea is to view the HHM diagram as a depiction of the "success scenario" S₀. Each box in the HHM then represents a set of actions or results that must occur as part of the definition of success. By the same token then, the box can represent the set of risk scenarios in which one or more of these actions/results fail to be accomplished. The union of all these sets thus represents a complete set of risk scenarios, S_i. Thus, HHM can be seen as one more method within the Theory of Scenario Structuring and takes its place there alongside the well-known methods of FMEA, HAZOP, scenario trees, and AFD.