8 levels of automaton (Sheridan, 2002)Automation offers no aid; human in complete control.Automation suggests multiple alternatives; filters and highlights what it considers to be the best alternatives.Automation selects an alternative, one set of information, or a way to do the task and suggests it to the person.Automation carries out the action if the person approves.Automation provides the person with limited time to veto the action before it carries out the action.Automation carries out an action and then informs the person.Automation carries out an action and informs the person only if asked.Automation selects method, executes task, and ignores the human (i.e., the human has no veto power and is not informed).