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Developers of modern software systems are often required to build software that addresses security, fault-tolerance and other dependability concerns. A decision to address a dependability concern in a particular manner can make it difficult or impossible to address other concerns in software. Proper attention to balancing key dependability and other concerns in the early phases of development can help developers better manage product risks through early identification and resolution of conflicts and undesirable emergent behaviours that arise as a result of interactions across behaviours that address different concerns. The authors describe an aspect-oriented modelling (AOM) approach that eases the task of exploring alternative ways of addressing concerns during software modelling. The paper focuses on use of the AOM approach to produce logical, aspect-oriented architecture models (AAMs) that describe …