===== Mean Active Maintenance Down Time (MAMDT) =====
[[dido:public:ra:xapend:xapend.a_glossary:start| Return to Glossary ]]


**Mean Active Maintenance Down Time (MAMDT)** is associated with Planned Maintenance System support philosophy. This is average amount of time while the system is not 100% operational because of diagnostic testing that requires down time.

For example, an automobile that requires 1 day of maintenance every 90 days has a Mean Active Maintenance Down Time of just over 1%.

This is separate from the type of down time associated with repair activities. 

Source: [[https://en.wikipedia.org/wiki/Availability_(system)#Definition | Mean Active Maintenance Down Time (MAMDT) ]]