Integration between OPM and other modules(FA, EAM, PAYROLL,...)

Hello experts,

I would like to understand how OPM integrates with other modules such as eAM, FA and Payroll.

1) How OPM can receive data from:

  - FA such depreciation cost

  - eAM such maintenance cost

  - Payroll such salaries

To include it to the production cost (calcul of Finished Goods) without passing through Overhead?

2) How to avoid double count in GL when we have FA, eAM, Payroll

even if we arrive to include different costs from thoses modules to OPM into batch cost?

Thanks for your support.

Thierry