Employee Number change

Dear all,

our current customer is changing  supplier of HR application (external) and due to this change planning to change Employee Numbers for existing employees. He asked me to estimate effort for this change in Oracle EBS. They are on R12, using Shared HR and manual numbering.

Enter Person form (PERWSEMP) allows Employee Number update. But they have found Note ID 454752.1 which says:

You CANNOT physically change the EMPLOYEE_NUMBER value for an employee as that value is carried in multiple tables with the Oracle Applications.

The only way for an employee to be assigned a new EMPLOYEE_NUMBER value is to terminate the employee, and then hire the employee as a NEW HIRE.