 |
|||
|
|
|||
| ||||||||||
|
|  MIL-T-62531(AT)
APPENDIX A
Verification Guidance
Review the test data collected after scoring by the FD/SC scoring criteria to determine
compliance with 3.5.1.
Verification Lessons Learned
3.5.2 Availability (inherent). The inherent availability of the vehicle system shall be not less
than ______ percent and shall be determined based on the following relationship:
A=
MTBF
x 100
MTBF + MTTR
Where:
A = Inherent availability.
MTBF = Mean time (hours) between failures.
MTTR = Mean time (hours) to repair, the MTTR is the summation of all active
repair times used to isolate a malfunction, effect repairs and restore the
vehicle system to operational status divided by the total number of
mission failures. Active repair time does not include supply
downtime, waiting administrative downtime and preventative
maintenance.
Rationale
Test data collected will establish the vehicle availability.
Guidance
Insert the figure for the required minimal percentage of vehicle availability time.
Lessons Learned
4.5.2 Availability (inherent). To determine conformance to 3.5.2, vehicle availability shall
be calculated using the results of reliability testing and maintainability testing. The minimum
availability acceptance shall be ______ percent.
61
|
|
Privacy Statement - Press Release - Copyright Information. - Contact Us |
Click
here for thousands of PDF manuals