The job scheduler records usage data for charge-back accounting when enabled through the administrative console. This function is available for all operating systems and can be enabled and disabled through configuration settings. Job usage information is not enabled by default.
See Overview of SMF record type 120 in the WebSphere Application
Server (z/OS), Version 6.1 information center for information on SMF recording
on z/OS. Also, see z/OS MVS System Management Facility (SMF) SA22-7630 for
additional information about using SMF records.