Question

Provide answers for the following: Compare condition based maintenance with planned preventive maintenance. In your own words explain which one you think is a better option and why.

Answer 1

Answer-

   (a)

	Condition Based maintenance	Planned preventive maintenance
Definition	Condition based maintenance is work that is performed at the exact moment when measured parameters reach unacceptable levels.	Planned preventive maintenance is work that is scheduled in the future based on analysis of sensor measurements and formulas.
Trigger	Measured parameter level	Predicted date
Cost	Medium/High(startup cost)	Medium/High
Cost Savings	Dependent on amount of equipment using condition based maintenance	25% to 30%
Pros	1. Maintenace work is performed only as needed. 2. Fewer unplanned downtime events. 3. Improved prioritization of maintenance time.	1.Maintenance need is predicted in advance. 2.Reduce maximum amount of downtime. 3. Improved automation of maintenance tasks.
cons	1. High cost of installation, training and maintenance. 2. Difficult to choose proper sensor equipment.	1. Expansive to implement and maintain. 2. Time-intensive.

(b) Planned preventive maintenance utilizing process efficiency, heat loss, or other nondestructive techniques can quantify the operating efficiency of plant equipment or systems. These techniques used in conjuction with vibration analysis can provide the maintenance manager or plant engineer information for achieving optimum reliability and availability from the plant. Hence, Planned preventive maintenance is the better option.