Workflow for Vendor Creation through a portal.

Hi All Workflow Experts,

I have a scenario here.In my project vendor is created through a portal.On submit button from portal the workflow is to be triggered.I have to design the workflow process.So can you please guide me through what all should i consider while i design this workflow?

This is my first workflow assignment so if you explain in detail it will be a great help.

I will just pen down what all scenarios i can think of:

1.Start workflow after vendor creation or modification.

2.Check whether approver are maintained in Org structure through standard FMu2019s.

3.Check If approvers are maintained ?

4.If yes,approve or reject the vendor.

5.If no,get the agents from the custom table who can take an action on this.

This is what i can think of.

Please guide me.

Thanks in Advance,

Saket.