I want to write a business concept for a restaurant and substantiate it with ladder of abstruction. It should be 5 pages. Can someone please show me how to do it or show me an example of a business concept...

Is this for college? For business school?

http://www.foodservicewarehouse.com/restaurant-equipment-supply-marketing-articles/how-to-start-a-restaurant/creating-a-restaurant-concept/c28302.aspx

First, make an outline. Then your paper will write itself.

What's a "ladder of abstruction"?

Did your teacher give you any guides?