DesignPremium EpisodesS3 Premium Episode #214: Conversion Ratio Avdi Grimm June 23, 2014 0 Comments Today we puzzle through a design problem that threatens to result in dozens of extra methods. This page is just for members. Sign in or subscribe to gain access! Username Password * Remember Me Forgot Password Related CategoriesDesign, Premium Episodes, S3 PremiumTagsMartin Fowler, oop, ORM