Hi Reddy,
You can go service market place and download the following which will provide complete guidance for your project.
1. Master Guide - Enhancement Package 7
2. Update and upgrade guide for EHP7
3.Latest SUM13 guide -
In pre-requistie section you have to prepare sheet for following things:
1. Media to be downloaded - Can get info from http://service.sap.com/swdc.
2. I can list some of the points which can be checked
- Update Kernel (including R3trans,TP and Library) to latest from market place
- Delta Check : Clean inconsistencies DD <-> DB in TA db02
- Check for running or failed incremental table conversions (ICNV)
- Check for any open repair objects in TR and release the same
- Check for customer objects with TADIR-SRCSYSTEM = 'SAP'
- Ensure that there are no unconfirmed Support Packages in your SAP system
- Check latest SPAM/SAINT version to latest
- Check file system requirement at OS level like /usr/sap/SID/SUM etc.
Regards
Ranpreet Singh