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020504hmancenter

020504hmancenter - 16.422 Human Supervisory Control...

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16.422 Human Supervisory Control Human-Centered Systems Engineering Design Approaches
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Traditional Systems Engineering Process Model* 16.422 Product Use, Phaseout, and Disposal Production and/or Construction Detail Design and Development Conceptual- Preliminary Design ACQUISITION PHASE UTILIZATION PHASE N E E D Operational requirements drive technical performance measures which drive human factors requirements….. Human considerations often are low priority *Blanchard, B. S., & Fabrycky, W. J. (1998). Systems Engineering and Analysis (3rd ed.). Upper Saddle River, NJ: Prentice Hall.
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The Spiral Systems Engineering Process Model* 16.422
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Three Mile Island 16.422 March 28 th , 1979 Main feedwater pump failure, caused reactor to shut down Relief valve opened to reduce pressure but became stuck in the open position No indication to controllers Valve failure led to a loss of reactant coolant water No instrument showed the coolant level in the reactor Operators thought relief valve closed & water level too high High stress Overrode emergency relief pump
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Three Mile Island Automation worked correctly Confirmation bias: people seek out information to confirm a prior belief and discount information that does not support this belief At TMI, operators selectively filtered out data from other gauges to support their hypothesis that coolant level was too high 16.422
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Human Systems Engineering* 16.422 (Courtesy of Aptima, Inc. Used with permission.)
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