Q: “Can you replace/emulate the functionality of “system A” in PeopleSoft?”
A: “Yes” …
… work ensues for many months reverse engineering the undocumented system A …
… a huge specification document is created and reviewed …
… much code is developed …
… users test the new system …
Statement: “The results from the new system don’t match the old system. There is a bug.”
Q: “Can you provide an example?”
… an example is provided with expected results ….
Q: “But system A doesn’t give those results …?”
A: “Oh … we’re comparing it to system B”
Err ….