PM and HR integration

Hai all ,

I like to know , If persons of different skills ( i.e., 2 skilled , 5 Un skilled , 2 engineers ) working for a particular maintenance Order , will have different salalries/ wages . how the Exact actual costs / planned cost will calculate after confirming the maintenance Order. How the list of persons who attended the job / maintenance order ( employee ID and Name ) will be displayed .and what is cost against each person for performing the activity.Here payroll is also taken int consideration.Where to enter the list of persons in the maintenance order who are performing the activity( do not want to enter in simple text field).

what configurations or settings required from PM amd HR .

Regards