Science is based on experimentation and data. Yet ironically the publishing of science has been largely based on faith, not study. The evidence based movement is transforming medicine, so why shouldn't the same thinking now transform publishing? At the BMJ Publishing Group we are taking a scientific approach to our own work, in pursuit of our vision of becoming an evidence based publisher. Evidence based publishing means studying the way we do things, objectively appraising our own practices in pursuit of better solutions, and …