OIE required approver can edit/modify internet expense report

Hi,

As per our business required, we have to implement workflow where it should go asper below mentioned & accordingly modify access requires at Approver level.

Require business process:     After submitting the i-Expense report:-

1). 1st Level - Approver for the physical submitted bills are being checked and modified by 1st level officer.

2). 2nd Level - Rechecked by 2nd Level manager who can amend the amount (in respect to the amount deductions).

3). 3rd Level - Line Manager also have the rights to amend the IE report (in respect to the amount deductions).

4). 4th Level - If approving limit exceeds as per DOA, in that case 4th Level will be the final approval (OR so on).