This enhancement gives you the option of defining your own measurement methods for determining earned value. You can do this in customizing, under "Create Measurement Methods".
Enhancement CNEX0031 contains the following component:
Code user exit EXIT_SAPLCJME_001 for determining percentage of completion (POC). You access the user exit in the transactions for determining percentage of completion and earned values ( CNE1 and CNE2).
The user exit is filled when you create the include in it. Choose " Choose" to edit the include.
Then activate the project.