We have a requirement to enhance our SAP HR/HCM system to EHP 4. Currently our system is on release 600 and level 053 and it is required to move to release 604 and level 007.
I need to find out if we enhance to EHP4 what will be the impact of this on other modules (if applicable) and if any impact what steps should be taken to subside them.
Also I need to find out the general implications of doing this and things to keep in mind before performing this task.
Please provide me with suggestions and relevant SAP notes to get this information.