The structure of a system is what enables it to generate the system's behaviour from the behaviour of its components. The architecture of a software system is an abstraction of the actual structure of that system. It should only be as complex as it needs to be while fostering the system's dependability ( i.e., the ability to deliver a service that users can justifiably trust).

Architecture description languages (ADLs) are used to describe software system architectures. They support communication among various stakeholders, as well as early analysis and feasibility studies of architectural design decisions.

In this talk I will discuss how ADLs currently address the means to attain dependability, namely fault prevention, fault tolerance, fault removal, and fault forecasting.

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