Position Change

Dear All,

          There is a Position change of an Employee and he is the final approval in process, how can i effect this in Purchasing.

          As we have HRMS in position hierarchy it got updated.

          In Approval Groups, Approval Assignments how can i do changes. Do I need to edit and rename approval group and previous approval group of the employee is to disabled.

         Please assist what is the sequence of steps to be followed and checks need to be done before going for any changes.

Thanks

Bhupati