Hmm ok, but my question is that, while something is transitioning out from the running state, in that time can something else from the ready queue swoop in and start running? I'm guessing not as the CPU is busy doing the transition but i would just like to double check. Moreover if only one transition can occur at a time, what do we do when multiple things need to change state, for example one thing from BLOCKED to READY and something else from RUNNING to BLOCKED.