The end users are actually the people who will be using Dynamics NAV on a daily basis. The project will truly succeed if they fully utilize the system. And they will only fully utilize the system if they believe it's reliable and find that it makes their job easier.
For all of this to happen, it is important that they get involved in all the steps of the implementation from the very beginning. They may not have a high position within the company, and they may not have the power to take certain decisions but they definitely have a lot to say.
When we talked about the definition of the internal processes, we said that you had to ask yourself and your people what were your processes, the activities inside each process, and the information used by the process. We also said that the real processes should be considered and not just the theoretical processes. The ones who actually know the real processes and activities are the end users. If their input is not taken into consideration...