How to run eligibility batch process for 1 business unit and exclude the remaining business units?

Summary:

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How to run eligibility batch process for 1 business unit and exclude the remaining business units from this run?

Use Case:

We have 30 business units, each BU has its HR team, accordingly each HR team might want to run the process and create performance document on different dates?

How to handle this case?

Also, when using 'Mass actions on performance documents', there is no security there if any HR person running the process, it will be applied on all business units?

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