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reliability key system attribute


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  3. Reliability Key System Attribute

One of the mandatory KSAs that supports the Sustainment Key Performance Parameter (KPP). It is a measure of the probability that the system will perform without failure over a specified interval, under specified conditions. Reliability must be sufficient to support the warfighting capability requirements within expected operating environments. Considerations of reliability must support both availability metrics, that is, Materiel Availability and Operational Availability. More than one reliability metric may be specified as Key System Attributes (KSAs) or Additional Performance Attributes (APAs), as appropriate. For continuous use systems, such as aircraft, reliability should be measured in terms of its primary usage metric (e.g., operating hours, miles or flight hours). For discrete systems, such as a single use munition, reliability should be measured as a probability. (JCIDS Manual) See “Reliability” for a more general definition.