Business Start-Up

How to use Mind Map for brainstorming a Business Start-up? Here is a mind map template that focuses on the core elements of any start-up - Customer, Value Proposition, Feature Set and Business model. In a perfect world, each of these concepts relates to each other in a cohesive story.  For example, if your value is saving someone time, are there any features that can be introduced for saving more time for your customer. Is there a way to quantify the time saved?