Thinking back to past experience, I give you the rules of ERP.
1) Hire a consultant
2) Build an unrealistic sense of possibility
3) Define requirements
4) Specify a product based mostly on what you can afford to pay
5) Purchase a product.
6) Implement and prepare for disappointment
7) Find that you don't get the benefits you expected
8) Either:
A) punish the innocent
B) customise your implementation so much that you can't ever upgrade it
C) build so much around the edges that you can't ever upgrade it.
(or all three)
mmitII 