Answer Posted / aashish khamparia

Predictive maintenance is the techniqe to determine the
condition of machine by sensing,measuring tools etc.
Example- Suppose one fan having abnormal vibration that
findout by our sensing tools (vibrometer etc. ) and we
attend the job and rectified the current problem in fan.
but in proactive maintenance , we serchout the main cause
of the problem, which may, design problem, whether problem,
operation problem etc, that to do solve out the problem , i
think that called proactive maintenance.

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