DOD-HDBK-791, MILITARY HANDBOOK: MAINTAINABILITY DESIGN TECHNIQUES (17 MAR 1988)

DOD-HDBK-791, MILITARY HANDBOOK: MAINTAINABILITY DESIGN TECHNIQUES (17 MAR 1988)., Maintainability and reliability are the two major system characteristics which combine to form the commonly used effectiveness index availability. Although reliability and maintainability share co-importance, maintainability merits special consideration because of its influence on system maintenance activities, i.e., the expenditure of man-hours and material, which represent significant budgetary costs over the life of the system. Maintenance activities also reduce the operational readiness of a system.