Maintainability. Maintainability is the ability of an item to be retained in, or restored to, a specific condition when maintenance is performed by personnel having specified skill levels, using prescribed procedures and resources, at each prescribed level of maintenance and repair. The established threshold for GCSS-MC/LCM Increment 1 is no more than four (4) hours of system downtime for 90.00% of downtime occurrences. The Contractor shall compute and report the Mean Corrective Maintenance Time (MCMT) and Corrective Maintenance Downtime Occurrences (CMDO) using the formulas provided in Figure 4below. πππ‘ππ πππππππππ πππππ‘ππππππ ππππ = πππ‘ππ πππππππππ πππππ‘ππππππ π΄ππ‘ππππ πππ‘ππ πππππππππ πππππ‘ππππππ ππππ = πππ‘ππ π·ππ€ππ‘πππ * 100
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