In twenty years of building consolidation, reporting and planning platforms, the projects that went wrong almost never went wrong because of the software. They went wrong because the chart of accounts did not match how the business was run, because master data was maintained in four places, or because nobody had agreed what a definition meant before it was automated.
We used to treat that as the first phase of another project. It is more honest to treat it as its own discipline, and to offer it on its own — including to companies that are not asking us for anything else.