Scenario: Invoice received doesn't match original Work Task amount.
Process:
1. Invoice rejected in BC (finance system)
2. Work Task Status automatically updates to Unmatched Invoice
3. User navigates to Variation tab
4. Creates Variation Request following same process as above
5. Variation explains/justifies Invoice discrepancy
6. Once approved, new Work Task created
7. New Work Task can be invoiced to match actual Invoice amount