Hi... Ashif ,
Standard Plant Maintenance Processes are :-
1. Breakdown Maintenance - Internal
2. Breakdown Maintenance - External
3. Preventive Maintenance :- (Single Cycle, Strategy , Multiple Counter Plan)
4. Calibration Process (Internal/External)
5. Regular Maintenance
These above are the processes which are commonly using in every organisation.
please confirm if you have any doubt in any process .
hope it will help you to understand the standard functionality of PM Module.