Question

What is the difference between system reliability and dependability.
Discuss methods of developing and building dependable software system.

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Reliability is considered one of the four-five dimensions of dependability, together with (1) availability, (2) safety, (3) security, and (4) resilience. Dependability is a measure of user’s trust into the system; this can be achieved if the system delivers the services as specified (reliability), but it is not the only way. The system must be also able to provide the services it was designed for when requested (availability). Not last, it has to protect against intrusions (security), detect and recover errors (resilience), and to limit the damage caused by failure (safety). In conclusion, dependability requires reliability, while reliability has its share for assuring dependability....

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