MIL-DTL-0048684B
n∑ x 2 - (∑ x) 2
S=
n(n - 1)
6.8 Definitions.
6.8.1 Early burst. A projectile that functions in flight further than the arming
distance from the weapon muzzle.
6.8.2 Premature burst. A premature burst is considered to have occurred if the
projectile functions in the weapon bore or in flight up to the arming distance from the
weapon muzzle.
6.8.3 Misfire. Failure of a round of ammunition to fire after the initiating
impulse has been applied to the primer or the failure of the initiated primer to ignite the
propellant.
6.9 Submission of alternative conformance provisions. All contractor proposed
alternative conformance provisions will be submitted to the Government for
evaluation/approval as directed by the contracting activity
6.10 Critical Inspection Equipment.
6.10.1 Contractor acceptance inspection equipment (AIE). Provisions concerning
the contractor's AIE used to verify the requirements of this specification should be
specified in the contract.
6.10.2 System Reliability. The contractor should provide for each defect
identified as Critical, a manufacturing and inspection system that assures no more than
one in a million contain the defect. This should be assured by controlling the maximum
defect rate produced and the error rate of the inspection equipment such that the product
of the two terms is less than one in a million.
6.10.3 Maximum defect rate produced. The maximum defect rate produced is
defined as the largest defect rate expected for the characteristics of concern on a monthly
or lot basis. The contractor should establish the maximum defect rate, however, it may
not exceed one percent without approval of the procuring contracting officer. Once
established, the contractor should monitor the defect rate to assure it does not exceed the
maximum rate allotted. If the established maximum defect rate is exceeded, the
production of that feature should be terminated until the cause is determined and
corrected. Additionally, all products for that period of time should be rejected and re-
inspected.
6.10.4 Maximum error rate of the inspection system. The error rate of the
inspection equipment should be defined as the expected ratio of the number of defective
parts accepted to the number of defective parts inspected by the equipment. The
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