Every year, automakers introduce dozens of new cars, and most of those are redesigns of a previous model. Why are these re-engineered, revamped and revved-up models so important to automakers? What do they really cost? And what do they mean to the bottom line? In this series of infographics, we'll look at the state of redesigns and use the refreshed 2014 Dodge Durango as a case study. The first infographic below details the impact of a redesign on automakers.