It is unlikely to get much repeat business from you. If the project succeeds, it gets good press from all around. When your project is successful, and you manage it properly, you gain more than the strategic capability the new system provides. You also get a large dose of know-how to enable continued, sophisticated change. Must have clearly defined roles and responsibilities.
Unfulfilled tasks cause a project to fail and fingers to start pointing.
The first step in avoiding this problem is for everyone to know their jobs and how they fit into the big picture. Must build a piece of your business on which your very survival depends. Must trust each other to do their jobs honestly. You must build and earn trust. But there is a way to expedite the process.