line of relationship from pep form and /PBFBI/HRPAO01

Hi expert,

       I am working on PEP, PEP allocate positions based on the assignments stored in /PBFBI/HRPAO01, I want to know when launch PEP from form, what components will be triggerred in SAP BW, where  /PBFBI/HRPAO01 will be used to allocate positions? so I want a clear line of relationship from pep form and  /PBFBI/HRPAO01.

Many Thanks,