The overview display should support the personnel in obtaining an overall view of plant status, gaining awareness of major changes in plant status, and identifying minor changes in plant state that are important to the plant condition.
Additional Information:
The overview display should support the personnel in understanding of the immediate health of the plant during ongoing operations and response to plant upsets. It should also serve to orient people entering the control room, including during shift turnover. The overview display should indicate major changes in plant condition, such as the presence of alarm conditions. It should identify conditions that are changing, their rate of change, their significance to plant safety, and their implications for the future state of the plant. In addition, the overview display should support personnel in identifying minor changes in plant condition (e.g., changes that have not gone beyond an alarm setpoint) that are important to maintaining a general awareness of plant condition. These indications should keep personnel informed of (1) the normal operation of ongoing plant processes (e.g., closure of a valve may indicate the completion of some stage of an automatic fluid transfer process) and (2) the early stages of potential problems (e.g., parameters that are approaching alarm conditions).