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PowerPoint Presentation Task Analysis Tools

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Videotaping Tips. Announce the name of the job on the tape. Tape 5 to 10 minutes for each task ... Try different angles to get the best shot. JHA/Work Methods ... – PowerPoint PPT presentation

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Title: PowerPoint Presentation Task Analysis Tools


1
Task Analysis Tools
2
Review the Basics
  • Risk Factors
  • Ergonomic Body Divisions

3
Risk Factors
  • Force
  • Frequency
  • Posture
  • Duration
  • Contact Stress
  • Environment
  • Vibration

4
Ergonomic Body Division
  • Upper Extremity
  • Lower Extremity
  • Trunk

5
Recognizing a WMSD Problem
  • Use OSHA 200/300 logs
  • Accident Reports
  • Workmans Compensation info
  • Employee Surveys
  • Visual Cues

6
Body Part Discomfort Form and Rating Scale
7
What is a Task Analysis Tool
  • A narrative, quantitative and/or checklist system
    that provides a standardized evaluation of a
    job/task
  • Tools based on biomechanical and physiological
    information compiled and calculated providing a
    relative risk of injury probability
  • Can be specific for body region and/or risk
    factors

8
Why do we need these tools?
  • Provide guidance
  • Where to begin corrective actions
  • Helps direct efforts toward specific body
    division, risk factors
  • Involve employees
  • Employees can perform assessments
  • Provide a level of measurement
  • Shows improvement of tasks
  • Baseline data

9
How do we use them?
  • Two criteria for use
  • What are you trying to find out?
  • General vs. Specific information
  • What limitations must be considered?
  • Various tools are only able to assess specific
    body regions

10
Types of Analysis Tools
  • Checklists
  • Easy to use
  • Less time consuming
  • Minimal training
  • Very sensitive One check, task must be
    considered

11
Types of Analysis Tools
  • Quantitative
  • Less sensitive
  • More specific training
  • Provide a relative risk assessment

12
Types of Analysis Tools
  • Narrative
  • More formal training and experience required
  • Provides specific areas for improvement
  • Very time consuming

13
Checklists
  • Washington State Checklist (WISHA)
  • NIOSH
  • University of Michigan

14
WISHA
  • Checklist system that identifies caution or
    hazard zone jobs
  • Incorporates each of the risk factors including
    vibration and contact stress
  • Has separate evaluation for heavy, frequent or
    awkward lifting
  • Uses verbal cues to guide user through
    evaluation criteria
  • Not generally left or right side independent

15
WISHA
  • Does address combination of risk factors
  • Great first cut ergonomic tool
  • Draw Backs
  • High sensitivity identify many jobs
  • Doesnt separate frequency component by body part

16
Using WISHA
  • 3 basic sections
  • Entire body checklist
  • Lifting hazard section
  • Vibration hazard analysis
  • Entire body checklist
  • Identify if a particular hazard exist as a result
    of a risk factor for a body part
  • If a hazard exists then corrective action is
    needed

17
Using WISHA
  • Lifting hazard analysis
  • Calculated weight limit is adjusted by
  • Compares the actual weight lifted to a calculated
    weight limit
  • Actual weight lifted gt Weight limit Hazard
    exists

18
Using WISHA
  • Vibration hazard analysis
  • Compares the time an employee uses the machine to
    a pre-measured vibration value
  • Plot time vs. vibration data on graph
  • Intersection point indicates degree of hazard
  • Vibration data www.lni.wa.gov/wisha/ergo

19
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20
Quantitative Tools
  • Job Strain Index
  • Rapid Upper Limb Assessment
  • ACGIH Threshold Limit Value HAL
  • Rapid Entire Body Assessment
  • Rodgers Muscle Fatigue Analysis
  • Snook Push/Pull Hazard Tables

21
Job Strain Index
  • Only evaluates hand, wrist and elbow (distal
    upper extremity)
  • Assess task based on posture, frequency and
    force
  • FORCE driven
  • Doesnt consider vibration or contact stress
  • Index based on a relative risk (1-1053)
  • 7 considered hazardous

22
Job Strain Index
  • Can assess right and left sides independently as
    well as worst case
  • Used in meat packing, small part assembly,
    keyboarding and other highly repetitive hand
    motions

23
Strain Index Elements
  • Intensity of exertions (force)
  • Duration of Exertion ( cycle)
  • Efforts per minute
  • Hand/wrist posture
  • Speed of work
  • Duration of task per day

24
Using the Job Strain Index
  • Assign a value for each of the 6 elements
  • Multiply each element strain index
  • Compare calculated value to decision threshold
    provided
  • Decision Threshold
  • lt3 safe
  • 3-5 uncertain
  • 5-7 some risk
  • gt7 hazardous

25
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27
JHA/Work Methods
28
JHA/Work Methods
  • Videotaping Tips
  • Announce the name of the job on the tape
  • Tape 5 to 10 minutes for each task
  • At least 3-4 cycles
  • Start with whole body shots and then zoom in on
    problems areas
  • Try different angles to get the best shot

29
JHA/Work Methods
  • Step 1 Breaking The Job Down
  • List each step in order of occurrence
  • Be sure to record enough information
  • Can use Gilbreths terms to describe steps
  • Can use video or photos

30
JHA/Work Methods
Gilbreths Table of Work Elements
  • Search
  • Select
  • Grasp
  • Reach
  • Move
  • Hold
  • Position
  • Inspect
  • Assemble
  • Disassemble
  • Use
  • Unavoidable Delay
  • Avoidable Delay
  • Plan
  • Rest to overcome fatigue

31
JHA/Work Methods
  • Step 2 Identify the Hazards
  • Look for Risk Factors in each job
  • Repeat the job observation until all hazards
    identified
  • Video and photos can be especially helpful
  • Consider abnormal activities and conditions

32
JHA/Work Methods
  • Step 3 New Procedure or Protection
  • Can the job be performed in another way?
  • Can you make physical changes to the job?
  • Does the job have to be performed? Can it be
    done less often?

33
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34
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35
What does the worker need to know from this
presentation?
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