Implementation, O&M, and Transition Implementation: The
realization of system (or an application, execution of a plan,
idea, model, design, specification, standard, algorithm, or
policy) into an operational environment. O&M (Operations and
Maintenance): When the system is fielded, it enters the
operations phase of its life cycle. Preventive maintenance is a
schedule of planned maintenance actions aimed at the prevention
of breakdowns and failures. Its primary goal is to prevent the
failure of equipment before it actually occurs. Preventive
maintenance is designed to preserve and enhance equipment
reliability by replacing worn components before they actually
fail. When a system fails, corrective maintenance is performed
to repair it. Transition: The point in a system’s life cycle
when it moves from the development phase to the
manufacturing/fielding/sustainment phase. Keywords: corrective,
implementation, maintenance, operations, preventive, transition
Although most of sustainment is typically not within MITRE