How work enters the system
Work entries identify the sources where jobs enter a subsystem to become available to run. Each type of job has different types of work entries that it uses.
For example, most batch jobs use job queues to enter the subsystem. Job queue entries are the mechanism through which a job queue is defined as a source of work to a subsystem.
Work entries are kept in the subsystem description. If a subsystem description does not have a work entry for the type of work being done, the job cannot run in that subsystem. The IBM-shipped subsystems have default work entries in the subsystem descriptions. Keep in mind, some of the default work entries that ship with the subsystems are already allocated to run specific jobs.
Parent topic:
How work gets doneRelated concepts
What work is What happens before work enters the system How work gets processed How work leaves the system