What are best practices for testing processes in ERP environment

We have started using SpiraTest as test tool for our ERP upgrade activities. As part of the testing we also execute Integration test where we track a specific transaction through the different stages (e.g. submit purchase orde fro supplier, register material receipt for this Purchase Order, enter payables invoice, match invoice to the receipt, pay invoice).

One way to put this in SpiraTest is to define a Test Set, where the Test Set represents the complete process. Then we assign individual Test Cases to this Test Set, where each test cases represents a specific process step (e.g. Create Purchase Order), and optionally weassign these test cases to different individuals/roles so the process can flow from Procurement to Materials to Finance.

Are there may be other ways for configuring these process tests that somebody came accross in their test environment?