Shopping cart approval step by step

Hi,

I am new to BRF workflows in SRM.

We have a requirement for approving the shopping cart. in this case the approvers will be maintain in ZTables based on Product Category, Account assignment category and Total value of shopping cart.

structure of ZAPPTABLE

User type | Acct assgin cate | Product category| Approver limit | Currency | Approver group1 | Unit price | Approver Group2 |

We have 2 approver group in ZAPPTABLE - Approver Group1 & Approver Group2

Each Approver group will have multiple approver . For eg u2013 Approver group 1 has 3 approvers and Approver group 2 has 4 approvers attached to each position.

In our case Workitem should be triggered sequentially

Workitem reaches approver1 of group1 u2013 Approved then

Workitem reaches approver 2 of group1 - Approved then

Workitem reaches approver 3 of group1 -

Please suggest how do we achieve this.

Thanks,

Satheesh