Development, application, and reliability of methods for ergonomic workload assessments in production evaluation and workstation design
Licentiate thesis, 2021
The inter- and intra-rater reliability of the OCRA checklist was studied through eleven ergonomists’ risk-assessments of ten video-recorded work tasks on two occasions. The statistical analysis included several parameters of reliability of which Cohen's linearly weighted kappa was the primary measure. The inter-rater agreement of the OCRA checklist was 39%, and the weighted kappa was 0.43; the intra-rater dittos were 45% and 0.52. This indicated that the OCRA checklist is a moderately reliable tool.
A risk assessment approach for digital human modelling (DHM) was developed. The approach included a reference database of epidemiological relationships between directly measured exposure and related musculoskeletal disorders. For illustration, a case in manual assembly was simulated; exposures were calculated and compared to the reference data to indicate the risk of WMSDs. The application and detailed assessment would be helpful to prioritise among different design solutions.
A 3D digital prototype laparoscopic robotic console was ergonomically evaluated using the DHM tool IMMA with 12 manikins representing anthropometries of the Swedish and US population. Work-ranges of the console and the manikins were calculated, compared and
ergonomically assessed using the Swedish standards and a US checklist for computer work. The assessment criteria related to the adjustable ranges of the screen height, height of the armrest, adjustable range of the pedals were not fulfilled. The DHM tool IMMA provides the possibility for a pre-production assessment of static work tasks.
Work-related Musculoskeletal Disorders
Digital Human Modelling
Chalmers, Industrial and Materials Science, Production Systems
Inter- and intra-rater reliability of the OCRA checklist method in video-recorded manual work tasks
Applied Ergonomics,; Vol. 84(2020)
Ergonomic Evaluation of a Prototype Console for Robotic Surgeries via Simulations with Digital Human Manikins
Proceedings of the 20th Congress of the International Ergonomics Association (IEA 2018) Volume V: Human Simulation and Virtual Environments, Work With Computing Systems (WWCS), Process Control,; (2018)p. 351-363
Ergonomic risk assessment in DHM tools employing motion data - exposure calculation and comparison to epidemiological reference data
International Journal of Human Factors Modelling and Simulation,; Vol. 6(2018)
Intelligently moving manikin - IMMA
Swedish Foundation for Strategic Research (SSF) (PV08.000.2), 2009-06-30 -- 2013-12-31.
Production Engineering, Human Work Science and Ergonomics
Medical Laboratory and Measurements Technologies
Environmental Health and Occupational Health
Areas of Advance
Innovation and entrepreneurship
Chalmers University of Technology
Seminariet kommer att hållas digitalt via Zoom
Opponent: Anna Brolin, Ph.D., Senior Lecturer in Integrated Product Development, University of Skövde, Sweden