| hasDefinition | The ability of an item to be in a state to perform a required function under given conditions at a given instant of time or over a given time interval, assuming that the required external resources are provided. Notes. 1 - This ability depends on the combined aspects of the reliability performance, the maintainability performance and the maintenance support performance. 2 - Required external resources, other than maintenance resources do not affect the availability performance of the item. |
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