stress&fatique

8/14/2019 Stress&Fatique

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HUMAN FACTORSHUMAN FACTORS


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MHS Kerteh Training Dep Haz08

PERCENTAGE OFPERCENTAGE OF


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STRESSTRES


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What is Stress?

Stress is the emotional and physical strain

caused by our response to pressure from theoutside world

Common stress reactions include tension,

irritability, inability to concentrate, and a variety ofphysical symptoms that include headache and afast heartbeat.

Although its impossible to live without somestress, in our environment out of control stressmay affect the safety of our operation.


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EXTERNAL PRESSUREMA

NAGEM

ENVIRONM

MIS

S

I

MACHI str estr es


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Cause of Stress

PHYSICAL /EMOTIONAL

CREATE

BODILY/MENTALTENSION RESULT


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Types of Stress

Physiological

Physical

Emotional


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Categories of StressAcute stress Cat 1Acute stress is usually for short time and may be due

to work pressure, meeting deadlines pressure orminor accident, over exertion, increased physicalactivity, searching something but you misplaced it,or similar things.Symptoms of this type of tension are headaches,

Acute Stress Cat 2Acute stress is common in people who take too manyresponsibilities and are overloaded or overworked,

disorganized, always in a hurry and never in time.These people are generally in positions of importanceat their workplace and stressful lifestyle is inherent inthem.Symptomsof this type of stress are prolonged


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Categories of Stress

Chronic StressThis type of stress is the most serious of all the3 stress types. Chronic stress is a prolongedstress that exists for weeks, months, or evenyears. This stress is due to poverty, broken or

stressed families and marriages, chronic illnessand successive failures in life.People suffering from this type of stress getused to it and may even not realize that they


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STRESS

BECOME BORED

COMPLACENT

FAIL TO TAKE ACTION.

TOO LITTLE


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STRESS

TOO MUCH

NARROW FOCUS

DOES NOT REMAIN OPENRELY ON PAST EXPERIENCES

AND KNOWLEDGE

FAIL TO SEE THINGSHYPERVIGILANT.


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STRESS

Expected vigilance effect in the performance ofpassive tasks with low signal rate. This shows a

30 60 90 120 150

100%

50%

0

T I M E (minutes)

V

IGI

LAN

CE

Effectiveness


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STRESS

OPTIMALPROVIDES

THE GREATESTOPPORTUNITY TO BE

VIGILANT


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STRESSORS IN AVIATION

MEDICAL DEHYDRATIOCHECKRIDES DIET

ILLNESS ALTITUDECHANGE

CONFLICT CONFINEDSPACE

POOR VISIBILITY TIME

SCHEDULES FATIGUEPASSENGERS

NOISE AND VIBRATION


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SUGGESTIONSTO

PHYSICAL ACTIVITYLEISURE ACTIVITIES

ANTI STRESS DIETGOOD RELATIONSHIP

WITH

COLLEAGUESRELAXATION


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--- Maintain Proficiency (can handlemore)

--- Prioritize Tasks (know whatsimportant)

--- Delegate (unload)--- Create Time (move from harm way)

--- Verbalize breaks in routine

(use collective memory)

Tools appropriate to overcomeoverload in flight


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?


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Let usLet ustaketake


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FATIgU


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What is Fatigue?

Extreme tiredness after a prolong activities

-Physical Fatiguethe inability to continue functioning at thelevel of one's normal abilities.

-Mental Fatigue (Somnolence)The strong desire to sleep or the usualstate falling asleep or just a general

decrease of attention, not necessary


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Fatigue in Aviation

A November 2007 report by the National

Transportation Safety Board indicates thatair crew fatigue is a much larger, andmore widespread, problem than previouslyreported. The report indicates that since

1993 there have been 10 major airlinecrashes caused by aircrew fatigue,resulting in 260 fatalities. Additionally, avoluntary anonymous reporting system

known as ASAP, Aviation Safety ActionProgram,reveals widespread concernamong aviation professionals about thesafety implications of fatigue. The NTSB

'


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CAUSE OF FATIGUE

vDISTURBANCE OFCIRCADIAN

RHYTHMS

v

CONTINUOUSWAKEFULNESS


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FACTORS CONTRIBUTE TO FATIGUE

Length of duty day

Shift irregularities

Quality of sleep

Poor dietDehydration

Extreme mental and

physical activitiesIllness

Caffeine, Smoking and

Alcohol


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FATIGUE

CONTRIBUTING FACTORS

HUMAN ERRORS


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SYMPTONS OF FATIGUE

SLOW REACTION TIME

INCREASED ERROR PREOCCUPATION

FIXATION

SHORT TERM MEMORYLOSS

IMPAIRED JUDGEMENT

EASILY DISTRACTED LOSS OF INITIATIVE

POOR COMMUNICATIONSKILL


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AFFECTS ON THEAFFECTS ON THE

- VISUAL PERCEPTIONSLOW- SLOW IN DECISION

MAKINGAND MEMORY TASK- SLOW IN MENTAL

ARITHMETIC- REACTION TIME SLOW


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Potential outcome ofPotential outcome of

Slower task performance

Decrease moral and motivation

Moody

Poor communication

Sleepy while on duty

Difficulty in concentrating

Headache and Stomachache.


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FATIGUE

COUNTERMEASURE HAVE SUFFICENT SLEEP IN

CONFORTABLE ENVIRONMENT

PROPER DIET

AVOID DEHYDRATION.

?


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?


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Lesson from the vide


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FATIGUED CREW

MUST BE AWARE OF

GRADUAL ANDCUMULATIVE EFFECT

OF FATIGUE,

WHICH DEGRADE

THEIR PERFORMANCE

IMPORTANT !!!!!!!!!!


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Thank you!Thank you!

Congratulations, here is what youve just accomplished;

Stress & Fatigue in Aviation

To know more about new exciting subject ,refer to the training programme given out to you.

stress&fatique

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