Use Environment per MIL HDBK-217F (Ground):
Ground, Benign: Nonmobile, temperature and humidity controlled environments readily accessible to maintenance; includes laboratory instruments and test equipment, medical electronic equipment, business and scientific computer complexes, and missiles and support equipment in ground silos.
Ground, Fixed: Moderately controlled environments such as installation in permanent racks with adequate cooling air and possible installation in unheated buildings; includes permanent installation of air traffic control radar and communications facilities.
Ground, Mobile: Equipment installed on wheeled or tracked vehicles and equipment manually transported; includes tactical missile ground support equipment, mobile communication equipment, tactical fire direction systems, handheld communications equipment, laser designations and range finders.
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Space Environments, Naval Environments, Airborne Environments
Back to the Mean Time Between Failure Definition, or the Military Specifications page.
Engineering Key Words: Failure Mode Analysis, Reliability Prediction, MIL-HDBK-217, Bellcore
/ Telcordia, IEC 62380
