To structure research or to present research results in a single page graphic visualisation, a mindmap comes in handy. It will prevent you from falling in the trap of always using a written report or a Powerpoint presentation.
Mindmapping software like XMind does the job. It is fairly easy to learn, quick to master and will present research results, conclusions, relationships etc. in a graphical display which makes it much easier to understand for the customer.
In my experience, mindmapping is an excellent solution to present research results to customers in a time constraint, customers who need a single page answer that is quick to understand and apply.
XMind is freeware, but the free version already has about all the options you need and the paid version is not particularly expensive either.