TAILIEUCHUNG - Lecture Software engineering (7/e): Chapter 20 – Ian Sommerville

In this chapter, the learning objectives are: To explain how fault tolerance and fault avoidance contribute to the development of dependable systems, to describe characteristics of dependable software processes, to introduce programming techniques for fault avoidance, to describe fault tolerance mechanisms and their use of diversity and redundancy. | Critical systems development Objectives To explain how fault tolerance and fault avoidance contribute to the development of dependable systems To describe characteristics of dependable software processes To introduce programming techniques for fault avoidance To describe fault tolerance mechanisms and their use of diversity and redundancy Topics covered Dependable processes Dependable programming Fault tolerance Fault tolerant architectures Software dependability In general, software customers expect all software to be dependable. However, for non-critical applications, they may be willing to accept some system failures. Some applications, however, have very high dependability requirements and special software engineering techniques may be used to achieve this. Dependability achievement Fault avoidance The system is developed in such a way that human error is avoided and thus system faults are minimised. The development process is organised so that faults in the system are detected .

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