Ergonomics improvement in a harsh environment using an audio
feedback system
Ergonomics improvement in a harsh environment using an audio
feedbacksystemDavid T. Goomas a,b,*, Paul H.P. Yeowc,
Journal Reviewed by
Mohammad Ali Akbar Felayati
2507100080
Assistant of Ergonomic and Work System Design Laboratory
Head of Human Resource Development Ministry
The study aimed to improve ergonomics, i.e. to increase
productivity, quality, and work satisfaction ofoperators working in
a harsh environment (i.e. freezer storage facilities) through the
use of an audio feedback system.
Conventional
Audio feedback
Work
Feedback
Therefore, the present study aims to investigate the
ergonomics of using an audio feedback system compared to
paper
pick list, using productivity, quality, cost effectiveness, and
operators
satisfaction as the ergonomics measurements.
Perusahaan Es Krim dengan Cold Storage raksasa yang proses
pickingnya menggunakan operator manual.
Operator mengambil es krim yang ada dalam ruang pendingin
raksasa dengan menggunakan petunjuk yang berupa checking list
Operator mengambil es krim yang ada dalam ruang pendingin
raksasa dengan menggunakan petunjuk yang berupa suara dari headset
(audio)
Studi Kasus
a plant walk-through was carried out to understand the process
and to discover any ergonomics problems.
unstructured interviews (Yeow and Sen, 2006)
Direct observations (DOs) (Bisantz and Drury, 2005)
Current and archival data (Bisantz and Drury, 2005) from the
distribution center (such as cycle time, quality, and cost
accounting figures) were retrieved and analyzed.
Ergonomics intervention was made on the identified problems.
In addition, unstructured interviews (Yeow and Sen, 2006) and
participative assessment (Sinclair, 2005) by means of a
questionnaire survey were conducted
to measure operators satisfaction of the intervention. (The
questionnaire used is shown in Table 2.)
Metode
Productivity : Average Picking Cycle Time (APCT) average time
(travel time pick time) to pick an order
Quality : Percentage of Mispick (MP%) = (total audited line
errors/total audited lines selected) x 100%
Workers satisfaction was measured through unstructured
interviews (Yeow and Sen, 2006) and an employee
satisfactionsurvey.
Ergonomics measurements: productivity, quality, and
Workerssatisfaction
Work Flow and Implempentation
(1) It made their job easier with their hands free.
(2) It made their job safer because they could focus on
looking
ahead for any slippery floor instead of looking down at the
paper pick list.
(3) It increased their quality of work, i.e. higher accuracy
in
picking.
(4) It helped them to stay focused on the order selection
task
rather than looking at the pick list, thus being more
productive.
Ergonomic Improvement
Performance and Quality Feedback
Handfree
Harsh Environment
Cost Effectiveness
Discussion Result
The research found that audio feedback system is a very
ergonomic system for harsh environment as it is effective in
increasing productivity, quality and workers satisfaction in
freezer distribution center
Conclusion
One limitation of this study is its small size (five
operators)
Ke depannya, harus ada audio system feedback yang dikembangkan
secara sederhana
Peluang
Musculoskeletal disorder risk as a function of vehicle
rotationangle during assembly tasksSue A. Ferguson*, Williams S.
Marras, W. Gary Allread, Gregory G. Knapik,Kimberly A. Vandlen,
Riley E. Splittstoesser, Gang Yang
Musculoskeletal disorders (MSD) are costly and common problem in
automotive manufacturing. The research goal was to quantify MSD
exposure as a function of vehicle rotation angle and region during
assembly tasks.
The study was conducted at the Center for Occupational Health in
Automotive Manufacturing (COHAM) Laboratory. Twelve subjects
participated in the study. The vehiclewas divided into seven
regions, (3 interior, 2 underbody and 2 engine regions)
representative ofwork areas during assembly. Three vehicle rotation
angles were examined for each region. The standard horizontal
assembly condition (0 rotation) was the reference frame.
Exposure was assessed on the spine loads and posture, shoulder
posture and muscle activity, neck posture and muscle activity
aswell as wrist posture. In all regions, rotating the vehicle
reduced musculoskeletal exposure. In five of the seven regions 45
of vehicle rotation represented the position that reduced MSD
exposure most. Two of the seven regions indicated 90 of vehicle
rotation had the greatest impact for reducing MSD exposure. This
study demonstrated that vehicle rotation shows promise for reducing
exposure to risk factors for MDS during automobile assembly
tasks.
Abstract
The vehicle was divided into 9 representative working regions
based on vertical height and horizontal reach distance.
Digunakan hanya 7 karena keterbatasan tempat
Metode
Therewere 27 dependentmeasures in several categories including
spine, shoulder, neck and wrist. There were six spine variables
including load measures of compression at L5/S1, lateral shear at
L2/L3 and anterior/posterior shear at L2/L3 (Knapik and Marras,
2009).
The spine posture variables included maximum sagittal
flexion,maximumlateral bend andmaximumtwisting posture.
There were 8 shouldermeasures including right and left
normalizedmuscle activity for the lateral and anterior
deltoidmuscles. Shoulder posture measures included right and left
maximum shoulder flexion and abduction.
The dependent measures for the neck were also muscle activity
and posture, specifically, the right and left superior trapezius
muscle activity, maximum neck flexion, extension and side bend.
There were eight wrist posture measures including maximum right and
left radial/ulnar and flexion/extension.
Variabel
Overall rotation of the vehicle reduced MSD exposure. Seven of
the nine regions had the most reduction is MSD exposure and
subsequent MSD risk reduction at 45 of rotation. Two of the seven
regions had the most reduction in MSD exposure and subsequent MSD
risk at 90 of vehicle rotation.
Conclusion
