What is the difference between system reliability and system safety? Give an example of a system that operates reliably but not safely
Reliability and safety are two different system characteristics. Reliability has to do with the capability of the system to continue to perform; safety has to do with the ability of the system to perform in a safe manner. Thus, a system could be reliable but not safe. For example, an antiaircraft missile control system may continue to operate under a wide range of operating conditions so that it is considerably reliable. If, however, the control system directs the missile to change direction and to fly back into its launching device, it is certainly unsafe.
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