How to trigger a second workflow from a workflow?

Question

Hi All,
          I want your guidance in deciding the process flow of a workflow to be developed.
          We have a scenario in our project where we have to develop a workflow for vendor creation/change
          done through a portal.Now we have designed to do through this 2 workflows.
          First workflow is triggered when the create/change is done in the portal and the entry is made in a
          z table.This is the trigger point of first workflow.
          First workflow will identify all approvals and store them in another z table with all the approval levels  needed and the approval groups stored in the z table itself.
          Second flow will trigger on the entry made in this z table.It will read all approvals and send the mails to tha approvers in the respective aproval groups.
Now can you please verify this.Is it possible to trigger a second workflow from a workflow?
If yes then can you please explain the methodology to do the same?
Also if any other approach can be taken,please suggest the same.
Thanks a lot,
Saket.

Answer 1

First Develop a Z Business OBject (let ZVENDOR) to update the Z table when ever a Vendor is created or Changed.
Now For the first workflow do like this
From the WD application when the user clicks on the SAVE button then call the Function module SAP_WAPI_START_WORKFLOW .
Develop a method in the ZVENDOR to update the Z table.Make the method as background.
Use the method that you have created in the above point in the first workflow but prior to this make sure that you have passed all the required information to the workflow.
Once the table is updated.
For Second Workflow
Create a Change document object for the Ztable.
And trigger the workflow when ever any entry is made or changed in the z table