We all know that false alarms degrade the value of an alarm system and operator performance, but how many does it take? A recent study found that at a 25% false alarm rate, operators behaved as if they had no alarm system at all (Meter, J., Wiczorek, R., Gunzler, T., Measures of Reliance and Compliance in Aided Visual Scanning” Human Factors, 56.5, (2014) 840-849). In the same study, they found that failure of the alarm system to detect a problem did not degrade the operator's reliance on the system. This study would argue that it is better to forego an alarm if it would potentially become a nuisance.
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RELATED EXTERNAL MEDIA
|Consortium Reports New Findings on Alarm Rates||Automation World|
|How Many Alarms Can An Operator Handle||Chemical Processing|
|Impact of Alarm Rates and Interface Design on Operator Performance||Automation World|
|Operator Interfaces: Moving from Comfortable to Most Effective||Automation World|
|Operator Performance as a Function of Alarm Rate and Interface Design||Mesa.org|
This year's Fall meeting for the Center for Operator Performance will be October 24-26 in Corpus Christi. For more information, please contact Lisa Via. Guests are always welcome!
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David Strobhar's book, "Human Factors in Process Plant Operation," is now available in both hardcover and Kindle e-book.
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