Page 101 - Global Project Management Handbook
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TABLE 4.3 Input Values for Calculating ALDT
Percent of spares available at system location 95%
Time required to obtain spare at system location 2 hours
Time required to obtain spare from other location 72 hours
Operational availability for required support equipment 98%
Delay time when support equipment is not available 48 hours
Average time for personnel to arrive to start maintenance 1 hours
Average time waiting to enter maintenance facility 2 hours
Average time waiting for transport to maintenance facility 0.5 hour
Average ADT while non-mission-capable 4 hours
FIGURE 4.10 Calculating ALDT.
FIGURE 4.11 Calculating ALDT.
Total time = 20 aircraft × 8760 possible operating hours per year = 175,200
NMCT = 576 hours + 7800 hours + 2102.4 hours = 10,478.4
(TCM) (TPM) (ALDT)
175,200 − 10,478.4
A O = = 0.94 = 94%
175,200
FIGURE 4.12 Calculating A O .
