Many uncertainties exist at the planning stage that none of the parties involved (software vendor, software implementer, if different, and the client) are able to fully discover and control. Vendors and implementers don't know the client's business well enough, while the clients aren't familiar with the software. Only aligned joint efforts of software providers and client managers, subject matter experts, and end users can lead to a successful system deployment - meeting expected business objectives within given budgets and time-frames. Another lurking issue in software implementation projects is that the degree of success of any given project can be measured only at the end of the road - mainly at the end of the implementation stage or after go-live.
But you may not have chosen the wrong solution. It might be that your implementation went wrong.
