Threat and error management
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aviation safety Aviation safety is the study and practice of managing risks in aviation. This includes preventing aviation accidents and incidents through research, educating air travel personnel, passengers and the general public, as well as the design of airc ...
, threat and error management (TEM) is an overarching safety management approach that assumes that pilots will naturally make mistakes and encounter risky situations during flight operations. Rather than try to avoid these threats and errors, its primary focus is on teaching pilots to manage these issues so they do not impair safety. Its goal is to maintain safety margins by training
pilots An aircraft pilot or aviator is a person who controls the flight of an aircraft by operating its directional flight controls. Some other aircrew members, such as navigators or flight engineers, are also considered aviators, because they a ...
and flight crews to detect and respond to events that are likely to cause damage (threats) as well as mistakes that are most likely to be made (errors) during flight operations. TEM allows crews to measure the complexities of a specific organization's context — meaning that the threats and errors encountered by pilots will vary depending upon the type of flight operation — and record human performance in that context. TEM also considers technical (e.g. mechanical) and environmental issues, and incorporates strategies from
Crew Resource Management Crew resource management or cockpit resource management (CRM)Diehl, Alan (2013) "Air Safety Investigators: Using Science to Save Lives-One Crash at a Time." Xlibris Corporation. . http://www.prweb.com/releases/DrAlanDiehl/AirSafetyInvestigators/ ...
to teach pilots to manage threats and errors. The TEM framework was developed in 1994 by psychologists at
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based on the investigation of accidents of high capacity Regular Public Transport (RPT) airlines. However, an evaluation method was needed to identify threats and errors during flight operations and to add information to existing TEM data. A Line Operations Safety Audit (LOSA) serves this purpose and involves the identification and collection of safety-related information — on crew performance, environmental conditions, and operational complexity — by a highly trained observer. LOSA data is used to assess the effectiveness of an organization's training program and to find out how trained procedures are being implemented in day-to-day flights.


Importance of TEM

Threat and error management is an important element in the training of competent pilots that can effectively manage in-flight challenges. Many strategies have been developed (e.g. training, teamwork, reallocating workload) that were focused on improving on
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,
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, and
error An error (from the Latin ''error'', meaning "wandering") is an action which is inaccurate or incorrect. In some usages, an error is synonymous with a mistake. The etymology derives from the Latin term 'errare', meaning 'to stray'. In statistics ...
. Flight crew training stressed the importance of operational procedures and technical knowledge, with less emphasis placed on nontechnical skills, which became isolated from the real-world operational contexts. Safety training, including TEM, is important because a crew's nontechnical (safety) knowledge helps more in managing errors effectively than crews' familiarization with operations through experience. Candidates who are shortlisted during selection and training processes must demonstrate analytical and coordination capabilities. Possessing these nontechnical skills allows pilots and crew members to carry out their duties efficiently and effectively.


Components of TEM

The following components are methods that help provide data for the TEM.


LOSA observation training

Training for LOSA experts includes two sessions: education in procedural protocols, and TEM concepts and classifications. A LOSA trainee is taught to find data first and then code them later for both sessions, during which a crew member must exhibit "LOSA Etiquette" — ability to notify the pilot as to why he or she was not able to detect an error or threat after a flight. The pilot's responsibilities include his or her opinions on what safety issues could have had an adverse impact on their operations. A LOSA trainee must then record the specific responses of the pilot and thereafter code performance using behavioral markers. The order of the recording is as follows: a) record visible threats; b) identify error types, crew's responses, and specific outcomes; and c) use CRM behavioral markers to rate crew. Observers will finally record a pilot's overall response on a 4-point
Likert scale A Likert scale ( , commonly mispronounced as ) is a psychometric scale commonly involved in research that employs questionnaires. It is the most widely used approach to scaling responses in survey research, such that the term (or more fully the ...
: 1) poor, 2) marginal, 3) good, and 4) outstanding. The data are then quantified and tabulated as exemplified by the following format: Planning and execution of performance Frequency is the total number of threats that occurred and is denoted by ''N''.


Categories of the LOSA

LOSA identifies three main categories that must be recorded: * Errors include procedural errors (mistakes or inadequacy of attention towards a task at hand), and violation of
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(intentional or unintentional). Although crew members are encouraged not to be afraid of admitting their mistakes, they must be able to criticize themselves since the learning process helps them understand the potential danger presented other crew members. * Undesired Aircraft States are aircraft configurations or circumstances that are caused either by human error or by external factors. The management of unintended states is vital since they can result in serious aircraft accidents. For example, navigation problems on the cockpit display may lead a pilot to make an incorrect decisions, potentially causing injuries or fatality to passengers and crew members alike.


Safety change process

Safety change process (SCP), which is part of LOSA, is a formal mechanism that
airlines An airline is a company that provides air transport services for traveling passengers and freight. Airlines use aircraft to supply these services and may form partnerships or alliances with other airlines for codeshare agreements, in whic ...
can use to identify active and latent threats to flight operations. It is a guideline that communicates in detail what is an imminent threat to current operations or who is causing the threat. In the past, SCP data were based on investigation of accidents or incidents, experiences, and intuitions but nowadays SCP focuses more on the precursors to accidents. There are several steps involved in conducting SCP: An unnamed airline conducted base-line observations from 1996 to 1998 using the defined SCP and LOSA data to improve its organization's safety culture and the results were positive. The crew error-trapping rate was significantly increased to 55%, meaning that crews were able to detect about 55% of the errors they caused. A 40% reduction in errors related to checklist performance and a 62% reduction in unstabilized approaches (
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s,
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,
runway excursion A runway excursion is a runway safety incident where an aircraft makes an inappropriate exit from the runway. Runway excursions include runway overruns, where an aircraft is unable to stop before it reaches the end of the runway. Runway excursio ...
s, etc.) were observed. A proper review and management of SCP and LOSA data can prevent further disasters in flight operations.


See also

*
Accident Classification Accident classification is a standardized method in accident analysis by which the causes of an accident, including the root causes, are grouped into categories. Accident classification is mainly used in aviation but can be expanded into other area ...
*
Aviation safety Aviation safety is the study and practice of managing risks in aviation. This includes preventing aviation accidents and incidents through research, educating air travel personnel, passengers and the general public, as well as the design of airc ...
*
Crew Resource Management Crew resource management or cockpit resource management (CRM)Diehl, Alan (2013) "Air Safety Investigators: Using Science to Save Lives-One Crash at a Time." Xlibris Corporation. . http://www.prweb.com/releases/DrAlanDiehl/AirSafetyInvestigators/ ...
*
Pilot Error Pilot error generally refers to an Aviation accidents and incidents, accident in which an action or decision made by the Aircraft pilot#Airline, pilot was the cause or a contributing factor that led to the accident, but also includes the pi ...
* Error Management * The curse of expertise


References

{{authority control Aviation safety Safety analysis