When you start in an environment that you don't know at all, and when there is an emergency, you need to act fast. The first step is obvious: you have to listen. You have to establish a diagnosis of the situation not by making analyses by yourself, but trying to analyze from data and from interviews you're having with many people at different levels of the company. So establish a diagnosis; listen and interact with many people, and make sure you have the right priorities before you share this diagnosis and the plan with everybody.