how to create custom attribute for requisition approval

Summary:

how to create custom attribute for requisition approval

Content (please ensure you mask any confidential information):

We have SLA TAB/TAD account rule based on the category account string cost center change in the requisition.

But we need requisition approval process based on employee cost center.

When we create a requisition the charge account default based on SLA.

the rule cost center wise hierarchy is going to wrong approval.

We need cost center will pick not from requisition level but from the employee level.

How to create custom attribute which will check from employee level cost ceter and trigger correct approval process