Hello A Prasad,
I assume you have already created and activated the required process chain.
This process can be schedule using RSPC transaction, you need to specify start condition etc, background job gets scheduled.
However if you want to create background job yourself, please follow below steps -
1. SE38 - Run Program RSPROCESS
2. Create and Save the Variant - Specify the Technical of Process Chain and Process Type as CHAIN
3. SM36 - To create a batch job, Specify Program Name as RSPROCESS and Program Variant created in Step#2.
4. You can also change user name on the top (instead of your user ID and you can put the system user id used for batch runs)
5. Save the job and update the Start Condition.
6. In SM37, you can check status of batch job.
Hope this will help you,
Thank you
Satish Waghmare