It is very much important to identify the critical operating parameters. The operator should know the implications of operating outside allowable limits. It helps operator during upset conditions. It also alerts the maintenance staff to instruments that require regular checking to ensure proper operation. Operator and maintenance team must know the safety concern of operating beyond the safe limits of the critical operating parameters. The distinction between alarm levels needs to be addressed as well. It is also helpful to know the corrective and emergency actions that are needed to prevent a hazardous situation from escalating.