Scheduling and Monitoring Jobs 
You can schedule jobs that run unattended in the background and monitor their progress.
You have made the settings that are relevant to your scenario in Customizing for Customer Relationship Management (CRM), by choosing:
For more information, see document in Customizing for CRM, by choosing
You can define any enterprise service that does not require user intervention as a component type. Each job is an instance of a component that has a well defined set of parameters. You must define the parameters for the task to be completed successfully.
You can schedule a job to run with the following release options:
Immediately
A single iteration of the job is scheduled and released for processing.
Date/Time
Several iterations of the job occur between the Scheduled Start Date / Time and No Start After Date / Time based on the Period Value you define.
Do not release job
The job is scheduled, but you must release it in Job Monitoring for it to process.
Choose Period
When scheduling a job, you can select a period value to have the job occur for several iterations. Alternatively, you can select Choose Period to define your own period iterations. For example, by entering 2 in the Day(s) field, you indicate that you want to execute the job every 2 days.
You can use job monitoring to:
Search and monitor jobs
Cancel the execution of jobs
Release scheduled jobs for execution
View the application log of finished or aborted jobs
Rerun existing jobs