ergonomics - notes | notes and related documents for … · » the environment. ergonomics is ......
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13/02/2011
Ergonomics
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Workplace Safety
Electrical Safety
Fire Prevention
Hazard Communication
Personal Protective Equipment
Lockout/Tag-out
Chemical Safety
Asbestos
Control
Confined
Space
Medical & First Aid
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What Is Ergonomics?
Modern Definition
Science of fitting workplace conditions and job demands to the capabilities of the
working population
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What Is Ergonomics?
Ergonomics is the science of
improving employee performance
and well-being in relation to the
» job tasks,
» equipment, and
» the environment.
Ergonomics is…
» a continuous improvement effort
to design the workplace for what
people do well, and design
against what people don’t do
well.
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What Is Ergonomics?
Ergonomics is fitting the job to the person.
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Ergonomics
Human Machine
Work Environment
Utmost Goal: “Humanization” of Work
Design with “E & E”: Ease and Efficiency
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The Pillars of Ergonomics
Psychology
Anthropometry
Biomechanics
Physiology
ERGONOMICS
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Applications of Ergonomics
Anatomy
Orthopedics
Physiology
Medicine
Psychology
Sociology
Industrial Engineering
Bioengineering
Systems Engineering
Safety Engineering
Military Engineering
Computer-Aided Design
Anthropometry
Biomechanics
Work Physiology
Industrial Hygiene
Management
Labor Relations
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Aim of Ergonomic
Optimal
Work System
Work System is
Adequate
Accepted
Work System
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Ergonomic Hazards
Defined as any situation that leads to undue physical or mental stress. They Include:
• Poor workplace design and layout leading to awkward postures
• Inappropriate handling or manual handling tasks • Tools or equipment • Excessive reaching, stretching and bending • Insufficient rest breaks • Excessive repetitive movements • Unsuitable work flow/methods
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Statistics from Perkeso 1996-2000 Lokasi kecederaan 1996 1997 1998 1999 2000
Belakang 3025 1954 2563 2510 2527
Bahu 2480 1979 2779 2440 2625
Lengan atas 521 433 513 551 457
Siku 952 655 708 630 660
Siku ke Pergelangan tangan 1618 1135 1082 778 867
Pergelangan tangan 1635 1163 1122 1068 1130
Tangan 11329 14229 10504 10975 11378
Jari 24323 25316 20059 22969 23264
Jumlah 45883 46857 39330 41921 42908
Jumlah kes yang dilaporkan 106508 86589 85338 92074 95006
Peratusan (%) 43.08 54.11 46.08 45.53 45.16
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Ergonomics Related Illness
Cumulative Trauma Disorders (CTDs)
Repetitive Motion Disorders
Work-Related Musculoskeletal Disorders (WMSDs)
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Cumulative Trauma Disorders
Bodily injuries or physical ailments that have developed gradually over periods of weeks, months, or even years as the result of repeated stresses on a particular body part
The main risk factors for office-related CTDs are:
Repetition
Awkward positions or posture
Excessive pressure or force
Another risk factor for CTDs would be:
Vibration
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Musculoskeletal Disorders
An MSD is an injury or illness of
– Muscles
– Nerves
– Tendons
– Ligaments
– Joints
– Cartilage
– Spinal Discs
A - articular capsule
B - ligament
C - tendon (section view)
D - muscle
E - tendons
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Symptoms of a MSD Subjective indicators of potential concern
Painful Joints
Pain, tingling or numbness in hands or feet
Shooting or stabbing pains in arms or legs
Swelling or inflammation
Pain in wrists, shoulders, forearms, knees
Fingers or toes turning white
Back and neck pain
Stiffness or burning sensations
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Examples of WMSDs
Lower Body – Low Back Pain
– Back Strain
– Disc Disorder
– Degenerative Disc Disorders
– Sciatica
– Knee Disorders
– Foot Disorders
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Examples of WMSDs
Upper Body – Tension Neck Syndrome
– Rotator Cuff Syndrome
– Lateral Epicondylitis (Tennis Elbow)
– Medial Epicondylitis (Golfer’s Elbow)
– Tendinitis
– Carpal Tunnel Syndrome
– DeQuervain’s Tenosynovitis
– Trigger Finger
– Hand-Arm Vibration Syndrome
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Common Physical Injuries/Illnesses
A - inflammation of the shoulder tendons
B - tennis elbow
C - inflammation of the wrist tendons
D - lesion of the knee cartilage
E - inflammation or tearing of the Achilles tendon
F - spraining of the thigh muscles
G - backache (due to a lesion of the ligaments or muscles)
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Repetitive Motion Disorders
A variety of muscular conditions that result from repeated motions performed in the course of normal work or other daily activities.
RMDs may be caused by: – overexertion
– incorrect posture
– muscle fatigue
– compression of nerves or tissue
– too many uninterrupted repetitions of an activity or motion
– friction caused by an unnatural or awkward motion such as twisting the arm or wrist
Source: (National Institute of Neurological Disorders and Stroke )
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Examples of Repetitive Motion Disorders
Carpel tunnel syndrome
DeQuervain’s disease
Raynaud’s syndrome (white finger)
Tendinitis
Tenosynovitis
Trigger finger
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Psychological Hazards
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Psychological hazards
• Boring, repetitive work –
lack of stimulation
• Threat (Direct/Indirect)
• Harassment, bullying
• Change, uncertainty
• Work environment
• Work pressure
• Low self esteem
• Low job responsibility
• Financial problems
• Conflict
• Poor work organization
• Little training or
instruction
• Little choice in type of
work
• Poor promotion
opportunities