To my knowledge, Erlang uses a cooperative scheduler. The process itself counts downs its reductions and yields when it is time. The programmer can call erlang:yield() to do this before time if he wants. Calling something like receive will also yield. I guess it comes down to definitions, but since Erlang is said to have only soft real-time (as opposed to hard real-time) properties, this makes more sense. The schedulers doesn&#x27;t give any guarantees as to when a process gets to run and the scheduler never really preempts a process. Again, to my knowledge.<p>Great article though!