There will be an initial loss in productivity as people adjust to the new procedures and practices. Loading information into the new system is often the most tedious and time intensive period. The new system is blamed for data inaccuracies. These inaccuracies were present in the information before the conversion but only came to light when the data became organized. You design a great database.
Users get to see their data clearly for the first time.
For the first time they see the inconsistencies, the errors. Seniors demand information from next level down via notes. This leads to compliance not enthusiasm. The Notes champion does not plan to stick around. Needless to say, things are in a shambles.