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RUL

RUL — Remaining Useful Life

The predicted period during which an asset is expected to continue performing its intended function before functional failure occurs.

Definition

Remaining Useful Life (RUL) is the estimated period during which an asset, component or system is expected to continue performing its intended function before reaching a failure condition or requiring replacement. RUL predictions commonly use condition monitoring, operational data, degradation models and prognostic algorithms to support predictive maintenance and asset lifecycle optimization.

Why It Matters

Remaining Useful Life predicts how long an asset is expected to continue operating before functional failure or replacement becomes necessary.

In Practice

Remaining Useful Life is widely used in predictive maintenance and prognostics to optimize maintenance scheduling, reduce unplanned failures and improve asset utilization.

Common Misuse

Remaining Useful Life predicts future operational life using condition and prognostic information, whereas Remaining Life is a broader engineering estimate based on inspection, degradation and integrity assessments.

Term Details
Synonyms:
RUL; Remaining Useful Life; Useful Life Remaining; Prognostic Remaining Life
Classification:
Reliability Engineering
Concept
Advanced
Applications

Reliability Engineering; Predictive Maintenance; Asset Management.

Where It's Used

Manufacturing.; Oil and gas.; Petrochemical.; Power generation.; Infrastructure.

References

ISO 13381-1; API 579-1/ASME FFS-1

See It In VisualAIM

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