Hi Hari,
My suggestion is dont go with the the job description. Create roles like below
1. Master data creation
2. Notification Creation
3. Notification Release
4. Work Order Creation
5. Work Order Release
6. Work Order TECO
7. Work Order Settlement
8. Work Order Closure
9. Maintenance planning (IP10 & IP30)
10. Reports (All display transaction under one roof)
Once you have defined these roles, then you can ask your client, what level of access do you want the maintenance operator (Only Notification Creation) etc
Regards
Terence