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Introducing Hierarchy to Non-Hierarchical Planning Models – A Case Study for Behavioral Adversary Models

Hierarchical planning approaches are often pursued when it comes to a real-world application scenario, because they allow for incorporating additional expert knowledge into the domain. That knowledge can be used both for improving plan explanations and for reducing the explored search space. In case a non-hierarchical planning model is already available, for instance because a bottom-up modeling approach was used, one has to concern oneself with the question of how to introduce a hierarchy. This paper discusses the points to consider when adding a hierarchy to a non-hierarchical planning model using the example of the BAMS Cyber Security domain.