What is Availability?
What is Availability?
Availability is a measure of the degree to which a system, service, or component is operational and accessible when required for use. It is typically expressed as a percentage and represents the ratio of the time a system is available for use to the total time it should be available, considering both planned and unplanned downtime[1][2][3][4].
Definition:
Calculation:
\text{Availability} = \frac{\text{Total Elapsed Time} - \text{Sum of Downtime}}{\text{Total Elapsed Time}}
This formula helps determine the proportion of time a system is up and running versus the total time it is expected to be operational[2][3][8].Measurement:
Factors Affecting Availability:
High Availability:
entry
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