Just found this great article on the Mad Fermentationist blog, well worth a read if you haven't seen it and are interested in the process of creating beer recipes.
http://www.themadfermentationist.com/2015/11/design-beer-recipe-in-10-steps.html
http://www.themadfermentationist.com/2015/11/design-beer-recipe-in-10-steps.html