Abstract
Trends have been extensively used in operations to monitor and manage evolving process situations. They provide detail about process variables but can take up significant screen space, potentially occluding other important monitoring parameters. As more data becomes available to the operations team, trends could proliferate and overload the operator. This paper presents the time-based information needs generated from plant personnel interviews, and discusses four existing and six alternative formats for displaying time-based information to tackle this problem. A framework was also developed to link the requirements to design options. The framework can be used to assess the benefits and limitations of the display options and help inform design based on the conditions of use in operations.
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