We begin to sell that recommendation so that it is implemented. We begin by transforming that hypothesis into a clearly formulated recommendation. Have the basic analysis needed to prove your case and not a little more. People are not impressed with your millions of spreadsheets. They are impressed when you can draw two or three basic analyzes that prove your case.
Once we have defined that recommendation, put it in a logical and clear argument. We help our audience understand what the problem is, why we need to solve it and how our recommendation can help.