Liam Rosenior is in, Enzo Maresca is out, and there is a Chelsea in-tray which needs working through if their new man is to secure their target of Champions League qualification this season.
Some of their issues are to do with how Rosenior gets them performing on the pitch, and some with how he handles himself off of it.
It is crucial if he is to succeed after walking in with a great deal of scrutiny surrounding his switch from their sister side Strasbourg.
Here, Daily Mail Sport runs through several areas which Rosenior must focus on fixing.