INTEGRATED LOGISTIC SUPPORT (ILS) INSPECTION, REDUCED Inspection under a sampling plan using the same quality level as for normal inspection, but requiring a smaller sample for inspection. INSPECTION SYSTEM REQUIREMENT A requirement to establish and maintain an inspection system in accordance with Government specification Mil-I-45208. The requirement is refer- enced in contracts when technical requirements are, e.g., to require control of quality by in-process inspection as well as final, end item inspection. INSPECTION, TIGHTENED Inspection under a sampling plan using the same quality level as for normal inspection, but requiring more stringent acceptance criteria. INSTALLATION (Complete Equipment) An installation (com- plete equipment) is defined as a combination of assemblies, acces- sories, and detail parts required to make one complete operating equipment. An installation comprises a group of permanently installed parts and a group of removable assemblies. INSTALLATION DRAWING An installation drawing provides information for properly positioning and installing items relative to their supporting structure and adjacent items, as applicable. INSULATION RESISTANCE The electrical resistance of the insulating material (determined under specified conditions) between any pair of contacts, conductors, or grounding devices in various combinations. INTEGRAL COMPOSITE STRUCTURE Composite structure in which several structural elements, which would conventionally be assembled by bonding or with mechanical fasteners after sepa- rate fabrication, are instead laid up and cured as a single, complex, continuous structure; e.g., spars, ribs, and one stiffened cover of a wing box fabricated as a single integral part. The term is sometimes applied more loosely to any composite structure not assembled by mechanical fasteners. INTEGRAL PARTS LIST A parts list prepared and revised as part of an engineering drawing. INTEGRATED LOGISTIC SUPPORT (ILS) A disciplined, uni- fied, and iterative approach to the management and technical activ- ities necessary to (a) integrate support considerations into system and equipment design; (b) develop support requirements that are related consistently to readiness objectives, to design, and to each 149