MIL-STD-790G
w/ CHANGE 1
3.13 Failure. The event or inoperable state in which, any item or part of an item does not, or would not, perform as previously specified.
3.14 Failure activating cause. The stresses, or forces, (thermal, electrical shock, vibration, etc.), which induce or activate a failure mechanism.
3.15 Failure analysis. The process of examining electrical, electronic, or fiber optic parts to determine the cause of variations of performance characteristics outside of previously established limits with the end result that failure modes, failure mechanisms, and failure activating causes will be identified.
3.16 Failure mechanism. The process of degradation, or the chain of events; which results in a particular failure mode.
3.17 Failure mode. The abnormality of an electrical, electronic, or fiber optic part's performance which cause the part to be classified as failed.
3.18 Failure rate. The total number of failures within an item population that is divided by the total number of life units expended by that population, during a particular measurement interval under stated conditions.
3.19 Inspection lot. A group of electrical, electronic or fiber optic parts offered for inspection at one time and in combinations authorized by the applicable specification.
3.20 Item. A non-specific term used to denote any product, including system, material parts, subassemblies, sets, or accessories.
3.21 Major change. Any change that alters the form, fit and functions (including design, material, construction, performance, quality, reliability, and interchangeability).
3.22 Manufacturer. The actual producer of said electrical, electronic, or fiber optic parts.
3.23 Production lot. A group of electrical, electronic, fiber optic parts manufactured during the same period from the same basic raw materials processed under the same specifications and procedures, produced with the same type equipment, and identified by the documentation defined in the manufacturer's qualified product system through all significant manufacturing operations, including final assembly operations. Final assembly operations are considered the last major assembly operations such as casing, hermetic sealing, or lead attachment rather than painting or marking.
3.24 Qualification. The entire procedure by which electrical, electronic, and fiber optic parts are processed, examined, and tested to obtain and maintain approval for qualified products listing.
3.25 Qualified Product Database (QPD). A database of products that have met the qualification requirements stated in the applicable specification, including appropriate product identification and test or qualification reference with the name and plant address of the manufacturer and distributor, as applicable.
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