===== Availability =====
[[ddsf:public:guidebook:06_append:glossary:start| Return to Glossary ]]

[[ddsf:private:guidebook:02_body:02_projreq:nonfunctional:14_reliability:02_availability|See 2.2.2.2 Availability]]

**Availability** is the probability that a system will work as required when required during the period of a mission. The mission could be the 18-hour span of an aircraft flight. The mission period could also be the 3 to 15-month span of a military deployment. Availability includes non-operational periods associated with reliability, maintenance, and logistics. 

Source: [[https://en.wikipedia.org/wiki/Availability_(system) | Availability ]]