Some companies try to lever their existing finance systems to deliver planning and reporting.
Sometimes this is just an excel add-in so if you are trying to escape the problems with Excel you will not.
Often you need to integrate data not held within the finance system, this often is impossible.
Finance systems are great for posting transactions raising invoices etc. But like Business Intelligence they lack the planning and reporting functionality and a dedicate planning and analysis software.
Fundamentally Financial Planning and Analysis software is more flexible and far faster to implement. This should ensure a rapid ROI.