Hi Chirag,
and scroll down on the page and pick the industry.
This is for best practices for the industry.
Not sure if this helps but SAP Best Practices for Chemicals – SAP Help Portal Page may give you some hint.
Details on how to download bestpractices are here - https://websmp105.sap-ag.de/~sapidb/011000358700000510932012E.pdf
To get project management methodologies for non-industry specific processes you can go to ASAP roadmap.
https://websmp210.sap-ag.de/asap
hope this helps.
Regards,
Ranjith Raghunathan