Definitions - std10520042

DOE-STD-1052-93

logic tree analysis

preventive maintenance living program

3. DEFINITIONS

3.1

APPLICABLE - The characteristic of a PM task when it is capable of improving the

reliability of the component by modifying the way a component fails and its failure

rate.

3.2

COMPONENT - A piece of equipment, such as a pump, valve, motor, or instrument

that is normally assigned a unique equipment identifier.

3.3

COMPONENT FAILURE - Loss of ability of a component to perform one or more

of its functions.

3.4

CONDITION-DIRECTED TASK - A task performed when component performance

or condition reaches a limit (either predefined or determined by engineering

evaluation) measured by performance or condition monitoring test where continued

satisfactory operation cannot be ensured.

3.5

CONDITION MONITORING - Tests and inspections that may be accomplished on

an unobtrusive basis to identify a potential failure. Condition monitoring includes

established predictive maintenance techniques.

3.6

CORRECTIVE MAINTENANCE - Repair and restoration of equipment or

components that have failed or are malfunctioning and are not performing their

intended function.

3.7

DOMINANT FAILURE MODE - The most probable failure mode of a component

during its design life.

3.8

ECONOMIC LIFE LIMIT - The time a component is expected to remain in-service

before the need for replacement of the component based on cost-effectiveness to

reduce the frequency of age-related failures.

3.9

EFFECTIVE - The capability of a PM task to improve component reliability to a

given level under cost, implementation, and other constraints.

3.10 FAILURE - See definition of functional failure.

3.11 FAILURE CAUSE - The physical mechanisms or reasons that produced the failure.

3.12 FAILURE EFFECTS - The consequences of a failure.

D-4