Availability management targets allowing organisations to sustain the IT service-availability to support the business at a justifiable cost. The high-level activities realise availability requirements, compile availability plan, monitor availability, and monitor maintenance obligations.
Availability management addresses the ability of an IT component to perform at an agreed level over a period of time.
- Reliability: Ability of an IT component to perform at an agreed level at described conditions.
- Maintainability: The ability of an IT component to remain in, or be restored to an operational state.
- Serviceability: The ability for an external supplier to maintain the availability of component or function under a third-party contract.
- Resilience: A measure of freedom from operational failure and a method of keeping services reliable. One popular method of resilience is redundancy.
- Security: A service may have associated data. Security refers to the confidentiality, integrity, and availability of that data. Availability gives a clear overview of the end-to-end availability of the system.
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