Condition-Based Maintenance (CBM)
One drawback of PM policy is that some components may be over maintained, i.e. replaced prematurely.
However, if the condition of the item can be monitored continuously or even frequently, PM actions
will be implemented only when failure is judged that is about to happen. This is the basic concept of CBM.
Performance-parameter analysis, vibration monitoring, oil analysis, etc. are some condition monitoring techniques
that are involved in CBM. Each of these methods discloses a specific type of fault. For example,
vibration-monitoring can be employed to detect wear, imbalance, misalignment, loosened assembles or turbulence
in plant with rotational or reciprocating parts[6]. A survey of the recent CBM models can be found in
Tsang