How is SAP Controlling integrated with SAP Project Systems?

Project accounting, budgeting and monitoring are general areas where typical project management activities require input from a cost controller. In SAP, the PS module which manages project management has tight integration with the CO module. The following submodules PS-COS (Costs), PS-REV, and PS-CAF (Payments) integrate tightly with CO via processes such as budgeting, results analysis, costing, payment and project settlement.