Get involved in testing the system
When a project starts, a consultant will take all the requirements needed to implement Microsoft Dynamics NAV or Microsoft Dynamics 365 Business Central and determine which of those requirements will be covered with the standard application and which ones will be developed for you.
Implementing Microsoft Dynamics NAV or Microsoft Dynamics 365 Business Central for a company is a unique process, since it will cover the specific needs of your company. Even for similar companies, there will be many differences between processes, making their implementation unique. No matter how much experience the implementer has in the companies of your sector, you and the people in your organization are the best testers to verify that everything works as defined.
Usually, the implementer will set up a second Microsoft Dynamics NAV server (or a Microsoft Dynamics 365 Business Central Sandbox instance, as explained in a later chapter) for you, so that you can test the system...