Several kinds of data may be imported into Microsoft Dynamics NAV. There are different ways to import that data into Microsoft Dynamics NAV and a variety of ways to present that data.
Do you remember anything about statistical classes? Let's remember some basics:
Several x Different x Many x A bunch = Too many options
This means that the migration processes should be carefully designed and planned. Everyone, both at the partner and at the customer end, should know what will be migrated, how it will be migrated, when it will be migrated, who is responsible for retrieving or filling in the data, how the data has to be presented, and what the result in Microsoft Dynamics NAV will be.
The tools that can be used, the way you can use them, and ...