What is a two state process model?

 At any time a process is being implementing by a processor or not. Therefore a process may be in Running or not running state. When an Operating System creates a new process it enters that process into the system in the not running state. The process exists is known as to the Operating System and is waiting to execute. From time o time the currently running process will be interrupted and the dispatcher portion of the Operating System will select a new process to run. The previous process moves from the running state to the not running state and one of the other processes moves to the Running state.