Principles of Work Design
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Transcript Principles of Work Design
제 5~7 주차 강의
5~7 주차(Design of Work)
교과서 4장: Manual Work
교과서 5장: Workplace, Equipment, Tool
교과서 6장: Work Environment
1-4주차
산업공학, 산업 발전 역사, IE 인재의 모습
교과서 1-2장
제조 프로세스
교과서 3장:
Operation Improvement Check List
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개선 체크 리스트
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8.
9.
Operation Purpose
Part Design
Tolerance and Specifications
Material
Manufacture Sequence and Process
Setup and Tools
Material Handling
Plant Layout
Work Design
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PowerPoint to accompany
Methods, Standards, and Work Design
12th Edition
Niebel/Freivalds
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Copyright © The McGraw-Hill Companies, Inc. Permission required for reproduction or display.
Manual Work Design
The Masculoskeletal System
Principles of Work Design
Motion Economy
Motion Study
Manual Work and Design Guidelines
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The Masculoskeletal System, Sliding Filament Theory
이두박근,
삼두박근, 상박근,
완요골근,
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Principles of Work Design
Achieve Max. Muscle Strength at the
Midrange of Motion
Achieve Max. Muscle Strength with Slow
Movement
Use Momentum
Optimize Human Strength Capability
Use Large Muscles for Tasks Requiring
Strength
Stay Below 15 Percent of Max. Force
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Force – Muscle length Realationship
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Typical Relaxed Posture / Force-Velocity Relationship
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Static Strength Positions / Static Endurance-Exertion Relationship
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Principles of Work Design-계속
Use Short, Frequent, Intermittent
Work/Rest Cycle
Design Task so that Most Workers Can Do
Use Low Force for Precise Movements or
Fine Motor Control
Do Not Attempt Precise Movement
Immediately after Heavy Work
Use Ballistic Movement for Speed
Begin and End Motions with Both Hands
Simultaneously
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성별, 나이에 따른 비 경련 유발 하에서의 근력
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Principles of Work Design-계속
Move the Hands Symmetrically and
Simultaneously To and From the Center of
the Body
Use the Natural Rhythms of the Body
Filing metal: 60~78 strokes / minute
Chiseling: 60
Arm cranking: 35
Leg cranking: 60~72
Use Continuous Curved Motions
Use Lowest Classification of Movement
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Difficulty versus Movement Time by Body Part
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Motion Class
Finger
1+ Wrist
2+ Lower Arm
4+ Upper Arm
4+ Trunk
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Principles of Work Design-계속
Work with Both Hands and Feet
Simultaneously
Minimize Eye Fixation
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Motion Study
Basic Motions: 17 Therbligs
Effective: RE, M, G, RL, PP, U, A, DA
Ineffective: S, SE, P, I, PL, UD, AD, R, H
Two Hand Process Chart or Operator P.C.
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Manual Work Design Guidelines
Energy Expenditure and Supply
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Energy Costs: 5.33 kcal/min recommended for 8h workday
1.33 kcal/min is energy expenditure during rest
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Heart Rate Guidelines for Energy Expenditure
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Heart Rate Guidelines for Energy Expenditure
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Low Back Compressive Forces
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디스크 :
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분석 모형의 예
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NIOSH Lifting Guidelines
National Institute for
Occupational Safety and
Health
• Type of Life
• Single
• Multiple
• Frequency
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General Guidelines for Lifting
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