[en] The international trend towards a CRT-based control centre design inherits the benefits and the problems associated with computer-based systems. For CANDU 3 the human/machine interface is entirely computer driven. It embodies console operation for all power levels, with backup workstations and large scale dynamic plant mimics for status overview. Emphasis is placed on developing ties between displays and operating procedures. The specific features that are regarded as benefits from the operations point of view are highlighted in this paper. The integration of the annunciation system information into the plant-wide database results in a systematic approach to problem solving for the operator and a consistent human/machine interface. The presentation of alarm information to the operator occurs at several levels: overview, system summary information, and point data alarms. A change from past practices in terms of the design of the control centre has been made. Specifically, a functional design method has been derived as an interpretation of an international control centre design standard. This addresses the need for a close connection between the control centre flow of information, operating procedures, and the computer system presentation of information . The Key to user acceptance of the CRT-based control centre design is the early cooperation of the operations personnel with the design team. Further validation of the control centre design and the display system integration is accomplished by the use of a simulator. Feedback from the simulator exercises will be early enough in the design stage to provide constructive changes as required. (Author) 9 refs., 4 figs