For good decisions,
receive good informations
Important information must be visible in a simple way, you do not have the time to search for them in several places.
The numbers must be able to be explained and analyzed in order to understand the reality behind these numbers. Thanks to a centralized system, you can drill down to see all details. And everyone gets the same numbers.
You must have a complete overview of your activity, because the reality is often multi-factorial.
For example, a profitability calculation must be able to take into account all costs, even indirect costs.