Mechanical exposure implications of rationalization: A comparison of two flow strategies in a Swedish manufacturing plant

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Mechanical exposure implications of rationalization: A comparison of two flow strategies in a Swedish manufacturing plant. / Palmerud, Gunnar; Forsman, Mikael; Neumann, W. Patrick; Winkel, Jörgen.

In: Applied Ergonomics, Vol. 43, No. 6, 2012, p. 1110-1121.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

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Author

Palmerud, Gunnar; Forsman, Mikael; Neumann, W. Patrick; Winkel, Jörgen / Mechanical exposure implications of rationalization: A comparison of two flow strategies in a Swedish manufacturing plant.

In: Applied Ergonomics, Vol. 43, No. 6, 2012, p. 1110-1121.

Publication: Research - peer-reviewJournal article – Annual report year: 2012

Bibtex

@article{2e4f15488d6c422499fb24c1e1c4ad9a,
title = "Mechanical exposure implications of rationalization: A comparison of two flow strategies in a Swedish manufacturing plant",
publisher = "Pergamon",
author = "Gunnar Palmerud and Mikael Forsman and Neumann, {W. Patrick} and Jörgen Winkel",
year = "2012",
doi = "10.1016/j.apergo.2012.04.001",
volume = "43",
number = "6",
pages = "1110--1121",
journal = "Applied Ergonomics",
issn = "0003-6870",

}

RIS

TY - JOUR

T1 - Mechanical exposure implications of rationalization: A comparison of two flow strategies in a Swedish manufacturing plant

A1 - Palmerud,Gunnar

A1 - Forsman,Mikael

A1 - Neumann,W. Patrick

A1 - Winkel,Jörgen

AU - Palmerud,Gunnar

AU - Forsman,Mikael

AU - Neumann,W. Patrick

AU - Winkel,Jörgen

PB - Pergamon

PY - 2012

Y1 - 2012

N2 - The aim of this case study was to (1) investigate differences in mechanical exposure (i.e. mechanical forces arising in the body of the operator) between two production strategies: long-cycle parallelised flow assembly (OLD) and conventional serial flow assembly (NEW), and (2) estimate potential changes in job exposure as a consequence of waste reduction when rationalising a line system.Data on postures, movements and whole body exposure were collected during an ordinary working shift, by means of video recordings synchronised to direct technical measurements of six professional operators.The results revealed the machine paced NEW system to have slower movements with less time spent in movements of high velocity compared to the self-paced OLD system. No significant differences were found between time-median posture levels. ‘Disturbances’ in the NEW system offered lower mechanical risk exposures compared to direct assembly work. Modelling the removal of wasteful ‘disturbances’ revealed both an increase in risk-implying fast movements and decrease in recovery-implying periods at low velocity – effectively isolating a work intensification. This study helps expose the complex relationship between rationalizations and mechanical exposure for system operators.

AB - The aim of this case study was to (1) investigate differences in mechanical exposure (i.e. mechanical forces arising in the body of the operator) between two production strategies: long-cycle parallelised flow assembly (OLD) and conventional serial flow assembly (NEW), and (2) estimate potential changes in job exposure as a consequence of waste reduction when rationalising a line system.Data on postures, movements and whole body exposure were collected during an ordinary working shift, by means of video recordings synchronised to direct technical measurements of six professional operators.The results revealed the machine paced NEW system to have slower movements with less time spent in movements of high velocity compared to the self-paced OLD system. No significant differences were found between time-median posture levels. ‘Disturbances’ in the NEW system offered lower mechanical risk exposures compared to direct assembly work. Modelling the removal of wasteful ‘disturbances’ revealed both an increase in risk-implying fast movements and decrease in recovery-implying periods at low velocity – effectively isolating a work intensification. This study helps expose the complex relationship between rationalizations and mechanical exposure for system operators.

KW - DfM - design for manufacturability

KW - DW - direct assembly work

KW - HRR - heart rate ratio

KW - IW - indirect assembly work

KW - VAW - value-adding work

KW - WI - work intensification

U2 - 10.1016/j.apergo.2012.04.001

DO - 10.1016/j.apergo.2012.04.001

JO - Applied Ergonomics

JF - Applied Ergonomics

SN - 0003-6870

IS - 6

VL - 43

SP - 1110

EP - 1121

ER -