A unified model of dependability: capturing dependability in context

In contemporary societies, individuals and organizations increasingly depend on services delivered by sophisticated software-intensive systems to achieve personal and business goals. So, a system must have engineered and guaranteed dependability, regardless of continuous, rapid, and unpredictable technological and context changes. The International Federation for Information Processing Working Group defines dependability as "the trustworthiness" of a computing system, which allows reliance to be justifiably placed on the services it deliver.