MIL-STD-790-SUP Established Reliability and High Reliability Qualified Products List QPL Systems for Electrical, Electronic, and Fiber Optic Parts SpecificationsThis standard is for direct reference in established reliability and high reliability electrical, electronic, and fiber optic parts specifications and establishes the criteria for a manufacturers qualified product system.

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MIL-STD-790G

5.2.4 Failure and defect analysis system. The manufacturer shall maintain a failure and defect analysis system. Failure analysis of parts are required when failures exceed the number allowed by the specification in qualification and conformance inspections or which have failed during field use (either at equipment contractor or military field activities).

5.2.4.1 Failure reporting. The manufacturer shall maintain a failure recording and reporting system for parts which have failed during qualification or conformance inspections or while in use in equipment. The system shall provide for at least the following:

a. The operating or test conditions under which the part failed, including environmental exposure levels, if known.

b. The source from which the failed part was received.

c. Verification of the reported condition of the failed part by the manufacturer's personnel responsible for production, inspection, quality, or engineering.

d. The length of time the part has been operating if it failed in life testing. Compliance within failure rate levels shall be calculated in accordance with the governing applicable product specification.

e. For field failures, review and corrective action (as applicable) shall be within 30 days after receipt of parts and supporting information.

5.2.4.2 Failure and defect analysis. The manufacturer shall maintain a system to retain the results of failure and defect analysis. This system shall provide for at least the following:

a. The results of analysis.

b. The probable failure activating cause when possible. c. Recommended corrective action.

d. Include approval by responsible authority.

* 5.2.4.3 Failure and defect analysis capabilities and facilities. The manufacturer shall have, either as part of their facilities or an arrangement with suitable laboratories outside of their facilities, proper capabilities to perform failure and defect analysis.

5.2.5 Corrective action. Where failures or defects are greater than the prescribed limits, the manufacturer shall prepare a recommendation for corrective action. Corrective Action recommendations for performance failures shall include failure mode information when established and shall be supported by verifying information, or a proposed evaluation test plan. Corrective actions on parts covered by the specification shall not be made without approval from the qualifying activity, except those actions which consist only of improvements in control operations. Corrective action affecting control procedures shall not be implemented for production until approved by qualified personnel.

5.2.5.1 Production of prototype parts for evaluation. Prototype parts for change evaluation shall be produced on the controlled production line to the point at which the proposed corrective change must be made; the change shall then be effected; and the changed prototype parts shall then be continued

through the balance of the normal series of production operations. Shipment of product incorporating the change shall not occur until approved by the qualifying activity.