Rather obvious

It's rather obvious when you know, but from my viewpoint, very few architects understand the need for information modeling. Even fewer know how to do it the whole way, from ax to bread.

Your transformation program will surely fail if you forget to design a proper information architecture.

The starting point is a business glossary for the relevant part of the business. Then a canonical information model and a logical interpretation of this. Finally API's and schemas.

Business model -> Information model --> Data model.

If you don't know the craft, then you are in uncharted territory and will get lost.