Hi Rajasekhar,
Though your query is wide area, I shall try to give some concepts.
BASIS
This provides any module (here PM) the authorizations to work called ROLES and UserIds, where these Roles are assigned.
BASIS will be making these ROLES on your specifications. (Authorization Objects and Fields)
Related Tcodes PFCG, SU01D etc.
MM
This is integrated widely with PM, wherever you use Material.
The integration starts while designing your structure (IH01) and populating the BOMs.
Also the Reference Objects of your Notifications and Orders are having Assembly as a field, this is another integration area.
Your Equipment/Functional Location Master is having Construction Type field, this is also a Material.
If Serilization done, then a Material with a particular Serial number is identified by a unique Equipment number.
In Maintenance Order, you use spares used in the Components Tab, these are Materials.
Over a period of time you will be getting the Materials consumed report equipment wise through reports like IW13.
FICO
Maintenance Order captures Components/Services Cost and Settles on respective Cost centres/ Equipments etc. This is briefly about FICO integration (also WBS elements in Orders)
QM
When you are using Refurbishment orders you make GR after completing the repairs through IW8W Tcode, which creates Inspection Lots, where Usade Decision made (QA32) and then puts into specified Storage Location For this Material Mater Inpsection views are need to be configured accordingly.(See here PM, MM, QM and FICO are involved.
PP
In the example above if we are using Machines as work centers in Operations tab. then it is PP integration. Because the Machines are PP work centres.
As I said this is just a brief not Exhaustive
Jogeswara Rao K