repetitive upper limb tasks - british occupational hygiene ... · session 4 aims: to introduce...
TRANSCRIPT
' Crown Copyright Health & Safety Laboratory 1
Repetitive Upper LimbTasks
Dr Lanre Okunribido: HSL Ergonomist
The ART Tool and Demo CaseStudies
…………………….......................………….....Session 4
Aims: To introduce delegates to ART assessment process
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Overview - Development
BS ISO11228
HSG60MAC
QEC
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Overview - Limitations• Not intended for DSE assessments
• Most suited for tasks that:– repeat every few minutes or even more frequently– occur for at least 1 – 2 hours per day
• Assessment criteria can struggle with:– prolonged fixed postures that are either not
awkward or may not occur for more than 50% ofthe time
– intensive finger motions (typing)– e.g. hair styling and dentistry work
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Overview - Design
• Three sections:– Assessment guide– Flowchart (pp 18-19)– Task description form and score sheet
(foldout)
• Traffic light system
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Task description Flow chart Score sheet
Assessment guide
Assessment Process
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Task Description Form
The worker has to pick sheets from a bin, locate the corners andfeed them on to attachments for the machine to ironautomatically.
<1 kg
None
~14
Ironing sheets
n/a
18 Sept ‘09
Company YMr X
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Task Description Form
2
6.5
DailyDaily
Placing folded sheets on conveyor
6 7 8 9 10 11 12 13 14
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Flowchart – Four Stages
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A – Frequency / Repetition
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B – Force
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B – Force Grid
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B – Force
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C – Awkward Posture
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C – Awkward Posture
Two stage approach:
“The neck is considered to bebent or twisted if an obvious anglebetween the neck and back canbe observed as a result ofperforming the task”.
2. For how long is thisangle obvious?
Yes
1. Is the head and neck in anawkward position?
No
A part of the time More than half the time
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C – Awkward Posture
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C – Awkward Posture
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C – Awkward Posture
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C – Awkward Posture
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D – Additional Factors
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D – Additional Factors
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D – Additional Factors
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D – Additional Factors
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Score Sheet
17
Monotonous work
0
2
0
64001
0
4
0
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D4 – Duration
17 130.75
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Score Sheet
17
Monotonous work
0
2
0
64001
0
4
0
0.7513
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• Based on combination of risk factors and practicalexperience
• Not an absolute but useful for prioritising tasks• The colours assigned to the risk factors will identify
where to focus risk reduction measures
Exposure Levels
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• It is possible to select intermediate scores
Top Tips
Frequent to very frequent?A/4 or R/5 acceptable
Bent forward for a small part ofthe time (e.g. 10%)A/0.5 acceptable
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Top TipsModerate to strong force?
R / 6
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Task description Flow chart Score sheet
Assessment guide
Assessment Process
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Practice Demonstration Case Studies
any questions at this time…?
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Task details
Gingerbread Packing
• The worker slides packages of gingerbread into cardboardsleeves.
• The worker reports the force is light.
• There is a shift duration of 8 hours. The worker rotates betweenthis task and a different non-repetitive task every after 60minutes. In total, they pack gingerbread for just less than half oftheir total shift time.
• Sometimes the worker has difficulties keeping up with the paceof the work.
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Task video
Gingerbread Packing
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Task description form
Gingerbread Packing
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The worker opens a cardboard sleeve with her left hand, slides thepackage into the sleeve, and then places the package across the tablewith her right hand
Less than 1 kg
None
2
Gingerbread packing
1008
Task description form
Gingerbread Packing
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1
3.75DailyDaily
Formal task rotation to alternative tasks (non-repetitive work)
7 8 9 10 11 12 13 14
Task description form
Gingerbread Packing
6
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Flowchart
Gingerbread Packing
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Stage A – Frequency / repetition
Gingerbread Packing
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Stage B - Force
Gingerbread Packing
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Stage C – Awkward postures
Gingerbread Packing
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Stage C – Awkward postures
Gingerbread Packing
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Stage D – Additional factors
Gingerbread Packing
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Score sheet
Monotonous work, high levels of attention
66020210210
Gingerbread Packing
20
6602042221025
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Stage D4 – Duration
Gingerbread Packing
25 190.75
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Score sheet
Monotonous work, high levels of attention
65020210210
Gingerbread Packing
20
65020422210
250.750.75
1519
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Your turn now
any questions at this time…?