Scrum by Jeff Sutherland. We implemented it at Lykki in one departments and within a few weeks there were scrum boards all ofer the office and in most departments. I have never seen something get such quick buy in and adoption for a new process. We are always trying new ideas and this one looks to be a winner.
I'm going to let you read more about Scrum here since this blog post could get pretty long. Try it out. I promise it will be worth your time.