The authors define actor-dependency models as a restricted class of goal-oriented models in which we focus on the actors and dependencies that exist in a system. An example of actor-dependency models are i* strategic dependency (SD) models (Yu, 1995). The structural analysis of actor-dependency models with respect some properties considered of interest for the modelled system (such as security, accuracy or efficiency), using some adequate metrics defined in terms of the elements of the model.

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