The advantages of process flows are two-fold. First, as the saying goes, "if you fail to plan you are planning to fail." A well designed process flow can definitely help you with your research. Though this point seems hackneyed, oddly enough in the past if you were to ask anyone in the lab to explain what he was doing, chances were he would be struck dumb as he really did not have the slightest idea of what he was up to. As this kind of users is really an accident waiting to happen, we cannot but keep him away from the lab for the sake of others. Apart from this, process flows act as a yardstick for us to screen out those unqualified users, thereby reducing the uncertainty and risks of contamination.