optics without moving parts, wiring harness. Note: Requires Qualification ESS of the design and processes, usually in the next higher assembly. Acceptance Testing is limited to Visual Inspection and Operational Testing in the next higher assembly. Active Unit Examples: PC board with solid state devices, electric motor, cathode ray tube, pressure vessel. Note: Usually requires Qualification ESS and Acceptance ESS. One-Shot and Limited Use Devices Examples: explosive, rocket propellant, gas generator, squib, battery. Method: Qualification ESS is by exposure to qualification environmental levels, then operated to demonstrate capacity plus a margin. Acceptance ESS is typically done on 10% of the production lot (but not less than 10 units) by exposure to qualification environmental levels, then operated to demonstrate capacity plus a margin. Failure of one UUT requires rejection of the production lot. For explosive devices, test requirements and methods are tailored from MIL-HDBK-1512 and NATO AOP-7. For batteries, guidance on test requirements is in RCC-Doc-319-99. Note: Surveillance Testing is a periodic repeat of the Acceptance Testing using trending or accelerated aging to authorize shelf life extensions. Trending involves frequent sampling and comparison to previous results to predict degradation. Accelerated aging involves stimulating known failure modes to detect degradation. First Production Article This is the UUT for Qualification ESS (typically three UUT are required). The UUT must be representative of the design, production line processes, materials, and workmanship. First Repaired Article Also called First Article. This is the UUT (typically four are required) that demonstrates that the repair source has the capability and processes to perform a satisfactory repair. Pre-Qualification Article Pre-Qualification Production Article. Also called Pre-production Article. This is the UUT used for program risk reduction and to qualify key processes, technologies, etc. Pre-Qualification Repaired Article. Also called Qual Article. This is the UUT (typically two are required) repaired by a potential repair contractor to meet, in part, the criteria to be on a Qualified Bidders List. Tailoring Tailoring is the formal engineering task of using existing technical data (requirements, standards, specifications, test plans, etc.) and selecting or modifying applicable areas to meet the requirements unique to the type of unit undergoing test. Non-applicable requirements are deleted. Other requirements may be added due to changes in Federal standards, identification of new hazards, modifications to the item, or changes in the mission/ESS profile. All areas of non-compliance with the technical data shall be identified by the contractor and a Requirements Tailoring