Abstract

Rational design of a process control system using an on-line computer requires a definition of the total control task and an allocation of function between the human operator and the machine. A knowledge of the historical development of the role assigned to the human operator provides useful guidance in making the allocation decision. This development is described, with emphasis on the function performed by the operator in modern computer control systems, on the importance of different process characteristics, on the increased understanding of the operator's role obtained from attempts to automate it completely and on the need to choose appropriate systems when carrying out experimental studies of the operator.

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