Approver Level in Workflow?

Hi all,

I have a z table and it has fields like PERNR APPROVER_LEVEL and APPROVER_ROLE.

and whevever workflow is trigger it will first go to approver level 1 then if it is approved by approver level 2 then it will go to second level....and if not approved within 1 week then it will go to secone approver level.

can anyone help me?do i need to create ZMETHOD for that?

Thanks and Regards,

Arpita