R/3 Accounting Interface: Overview 
The R/3 Accounting Interface is an Application Programming Interface (API) to statistics data on system resource consumption. The statistics data is collected by the Workload Monitor of the Computing Center Management System (CCMS). Application developers can use the R/3 Accounting Interface to access this data. The collected data can be mapped to accounts and passed on to accounting software for accounting purposes.
Data is collected and summarized by the job
COLLECTOR_FOR_PERFORMANCEMONITOR .
See also:
Installation and Setup Creating an Account Available Statistics Data Function Modules for R/3 Accounting