Disclaimer

The content of this site has been prepared by the members of the thematic network "S2S - A Gateway for Plant and Process safety". Since the conditions of use are beyond our control we disclaim any liability, including patent infringement, incurred in connection with the use of these products, data or suggestions.

The thematic network S2S is a European Community Project carried out in the "Competitive and Sustainable Growth" programme and funded in part by contract number G1RT-CT-2002-05092.
 

Glossary

in
A B C D E F G H I J K L M N O P Q R S T U V W Z All terms
 

Mistakes

In some contexts, errors are categorised as ?slips? or ?mistakes,? based on the cognitive psychology of task-oriented behaviour. Attentional behaviour is characterized by conscious thought, analysis, and planning, as occurs in active problem solving. Schematic behaviour refers to the many activities we perform reflexively or as if acting on ?autopilot.? Complementary to these two behaviour types are two categories of error: slips and mistakes.

Mistakes reflect failures during attentional behaviours, or incorrect choices. Rather than lapses in concentration (as with slips), mistakes typically involve insufficient knowledge, failure to correctly interpret available information, or application of the wrong cognitive rule. Thus, choosing the incorrect process routing on a control panel represents a mistake. A slip, on the other hand, would be forgetting to close a drain valve on that same route.

Distinguishing slips from mistakes serves two important functions. First, the risk factors for their occurrence differ. Slips occur in the face of competing sensory or emotional distractions, fatigue, and stress; mistakes more often reflect lack of experience or insufficient training. Second, the appropriate responses to these error types differ. Reducing the risk of slips requires attention to the designs of protocols, devices, and work environments?using checklists so key steps will not be omitted, reducing fatigue among personnel (or shifting high-risk work away from personnel who have been working extended hours), removing unnecessary variation in the design of key devices, eliminating distractions (eg, phones) from areas where work requires intense concentration, and other redesign strategies. Reducing the likelihood of mistakes typically requires more training or supervision. Even in the many cases of slips, safety management has typically responded to all errors as if they were mistakes, with remedial education and/or added layers of supervision.

References:

 

Related Material

  • Also check the free text search on 'Mistakes'

Contentbelongs to:Human Factors (or Human Factors Engineering)
 
Copyright by S2S - A Gateway for Plant and Process Safety - All Rights Reserved.
Web site engine's code is Copyright © 2003 by PHP-Nuke. All Rights Reserved. PHP-Nuke is Free Software released under the GNU/GPL license.
Page Generation: 0.083 Seconds