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Step 10. If the previous 9 steps provide inconclusive evidence
as to the chargeability or non-chargeability of a reliability
failure, the incident should be checked against the criteria of
50.1. If categorization of the incident remains in doubt,
defer classification to a user/developer/tester Scoring
Conference.
60.
RAM-D DEFINITIONS.
60.1 Reliabilitv. Availabilitv . Ma intainabilitv, and
q
rability
q
q
q
(RAM-D) term
and efinitions
Reliability, maintainability and
q
durability terms an definitions used in this specification are
in accordance with MIL-STD-721 and 60.1.1.
60.1.1
ura bility. Durability is the probability that an item
will successfully survive its projected life, overhaul point, or
rebuild point (whichever is the more appropriate durability
measure for the item) without a durability failure.
60.1.2 Dura bility failure. A durability failure is considered
to be a malfunction that precludes further operation of the item
and is great enough in terms of cost, safety, or time to restore,
that the item must be replaced or rebuilt.
ailure. For the purpose of assessing reliability, a
60.1.3
failure is a malfunction that the operator or crew cannot or is
not authorized to remedy by adjustment, repair, or replacement
action within five minutes, using the controls, Basic Issue Items
(BII), Items Troop Installed or Authorized (ITIA) and parts
authorized to the crew, which causes or would cause:
a.
inability to commence or the cessation of any mode of
operation.
b.
a critical or catastrophic hazard to personnel or equipment
as defined by MIL-STD-882. For related malfunctions only
the primary malfunction will be counted against reliability
(see 50.1.1).
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