Maintenance Catagories

MAINTENANCE CATAGORIES

Basically there are two types of maintenance tasks they are

Breakdown maintenance 

Planned maintenance

Planned maintenance may further be classified into

Preventive maintenance Corrective maintenance Predictive maintenance

Condition based maintenance Reliability centered maintenance

Corrective maintenance

The main objectives of this program are to

Eliminate breakdowns

Eliminate deviations from optimum operating conditions

Eliminate unnecessary repairs

Optimize all critical plant systems Preventive maintenance

It is a maintenance program which is committed to the elimination or prevention of corrective and break down maintenance.

Benefits of preventive maintenance

It maintains the equipment in good condition to preventin them from bigger problems.

Prolongs the effective life of the equipments. Detects the problem at earlier stages.

Minimize/eliminates the rework/scrap and helps in reducing the process variability.

Significantly reduces unplanned  downtime.

Predictive Maintenance

Predictive maintenance is a management technique that uses regular evaluation of the actual operating conditions of the plant equipment. Benefits of preventive maintenance

Reduced breakdown losses.

Reduction of quality defects. Increased net operating profit Reduced maintenance costs

Condition based maintenance techniques Vibration Monitoring

Determines the actual conditions of equipments/machines by studying the noise or vibration produced during functioning.

Thermography

Determines the condition of plant machinery, systems etc. by studying the emissions of infra red energy i.e. temperature

Reliability Centered maintenance

The rough process of RCM is as follows

1.     Target products or systems of maintenance should be clearly identified and necessary data should be collected

2.     All possible failures and their effect on target products or systems are systematically analyzed

Application of RCM

When designing, selecting and installing new systems in a plant.

When setting up preventive maintenance for complex equipment and systems for which we are not clear on how they work.

When teaching people the basics of reliability it helps to explain the matters in a detailed fashion using RCM.