> I (am actually told to) teach that changing the business to fit SAP is preferable to changing SAP to fit the business. And it's accurate advice. It shouldn't be, but it is.

This isn't necessarily bad advice when moving to a new system.

If the development cost exceeds or far exceeds the retraining cost then this is sound advice. I appreciate that this could be a tough calculation to make.

Change resistance will likely be a factor here but sometimes the old processes were hated by the actual users, though not the managers, making the decisions.