Open Access

Table 1.

Maintenance strategy evolution.

Maintenance strategy Reactive maintenance (RM) Preventive maintenance (PM) Predictive maintenance (PdM) Prognostics & health management (PHM)
Maintenance interval Fail and fix Time based; usage based Reliability based; condition based Improve & sustain
Object Component Component; function; Component; function; system Component; function; system
Planning & Scheduling Planning on the fly Planning & scheduling based on optimal PM interval Predictive planning & scheduling Proactive planning & scheduling
Failure severity and frequency Low severity, low frequency Low to medium severity, high frequency Medium to high severity, low frequency High impact, high frequency
Human factor (inspection & decision-making) High Intermediate Low Low (false alarm)
Cost effectiveness Labor intensive; Labor and material Costly due to over maintenance or ineffective & inefficient PM Cost-effective; extended life & less failure-induced costs Cost-effective: Substantially save failures & extend the life of equipment
Requirement for technology readiness Low Low High High

Current usage metrics show cumulative count of Article Views (full-text article views including HTML views, PDF and ePub downloads, according to the available data) and Abstracts Views on Vision4Press platform.

Data correspond to usage on the plateform after 2015. The current usage metrics is available 48-96 hours after online publication and is updated daily on week days.

Initial download of the metrics may take a while.