Dear Jeeva,
your question is answered in SAP Service Marketplace --> http://service.sap.com/mopz:
Choose your version of the Mainteance Planning Guide:
- Maint. Planning Guide 7.1 SP05ff. --> see chapter 3 & 4, especially
- Maint. Planning Guide 7.0/7.1SP01-04 --> see chapter 4 & 5, especially
You find the process steps, screenshots and links to detailed documentation of steps. I hope that helps.
Best Regards,
W. Hengevoss
SAP AG