download examples of mission critical systems

The costs of system failure may be very high.

Systems that are not dependable and are unreliable, unsafe or insecure may be rejected by their users. A system does not have to be trusted to be useful. Usefulness and trustworthiness are not the same thing. It reflects the extent of the user’s confidence that it will operate as users expect and that it will not ‘fail’ in normal use. The dependability of a system reflects the user’s degree of trust in that system. To explain that, to achieve dependability, you need to avoid mistakes, detect and remove errors and limit damage caused by failure.ģ Topics covered A simple safety-critical system System dependabilityĪvailability and reliability Safety SecurityĤ Critical Systems Safety-critical systems Mission-critical systemsįailure results in loss of life, injury or damage to the environment Chemical plant protection system Mission-critical systems Failure results in failure of some goal-directed activity Spacecraft navigation system Business-critical systems Failure results in high economic losses Customer accounting system in a bank ĥ System dependability For critical systems, it is usually the case that the most important system property is the dependability of the system. To explain four dimensions of dependability - availability, reliability, safety and security. 2 Objectives To explain what is meant by a critical system where system failure can have severe human or economic consequence.

Download examples of mission critical systems