Risk Factors Identification for Metal Washing Process Based on QOC Matrix the Workers’ Voice and Ergonomic Mapping

  • Brenda Trujillo-Sandoval
  • Martha Roselia Contreras-ValenzuelaEmail author
Conference paper
Part of the Advances in Intelligent Systems and Computing book series (AISC, volume 970)


In order to determine ergonomic risk factors to be abated during an ergonomic intervention in a metal washing process, two tools were implemented. The questionnaires from the QOC Matrix the workers’ voice was used to build a relationship diagram used to develop an ergonomic mapping. The Ergonomic risk map resulted identified the relationship, between workplace design and non-ergonomic content task. The method used to determine the risk factors was the follow: (a) define the non-ergonomic parameters inside work areas and task content using QOC results, (b) measure the results to categorise them in an ergonomic risk map, (c) using the ergonomic risk map a diagnosis was to carry out, (d) a redesign was proposed to abate non-ergonomic parameters. The activities developed for filling and discharging the washing machine included handling, lifting and carrying a plastic bucket of 40 kg above the shoulders, with an exerting force of 250 N in each lifting, for 120 times. It represented the main ergonomic problem. During the intervention, a new redesign for the working place was proposed; the improving phase incorporated two automatic sulfuric acid dilution system, two automatic mixers and an automatic production line for filling and discharging the washing machine. Consequently, workers change their character of mixers and loaders to the operators of an automatic control panel.


Ergonomics Process mapping Risk factors Systems engineering 



Thank you for the enthusiastic participation of employees and students in the present study.


  1. 1.
    International Ergonomic Association.
  2. 2.
    Secretaria del Trabajo y Previsión Social [homepage on the Internet]. La importancia de la Prevención en los riesgos laborales [updated 1 February 2019; cited 20 February 2019].
  3. 3.
    Department of Labor [homepage on the Internet]. Safety and health topics. Ergonomics. [updated 2019; cited 15 January 2019].
  4. 4.
    Luttman, A., Jäger, M., Griefahn, B., Caffier, G., Liebers, F. et al.: Prevención de trastornos musculoesqueléticos en el lugar de trabajo. Serie protección de la salud de los trabajadores. No. 5. Federal Institute for Occupational Safety and Health, France (2001).
  5. 5.
    ISO 11228-3:2007. Ergonomics – Manual handling – Part 3: Handling of low loads at high frequency. International Standard Organization, Switzerland (2007)Google Scholar
  6. 6.
    Cruz, J.A., Garnica, A.: Ergonomía aplicada. Cuarta Edición. Ed. ECOE Ediciones, Bogota (2010)Google Scholar
  7. 7.
    Lozano-Ramos, E., Contreras-Valenzuela, M.: Development of the QOC Matrix – the worker’s voice (Part 1). Advances in social and organizational factors. In: Proceedings of the 5th International Conference Applied Human Factors and Ergonomics AHFE, pp. 433–440, Poland (2014)Google Scholar
  8. 8.
    Miranda-Sánchez, J., Contreras-Valenzuela, M.: Development of the QOC Matrix – the worker´s voice (Part 2) procedia manufacturing. In: Proceedings of the 6th International Conference Applied Human Factors and Ergonomics AHFE, vol. 3, issue C, USA (2015)Google Scholar
  9. 9.
    Contreras-Valenzuela, M.R., Guzman-Clemente, A.D., Cuenca-Jimenez, F.: Methodology for detecting musculoskeletal disorders in industrial workplaces using a mapping representation of risk. In: Korhan, O. (ed.) Work-related Musculoskeletal Disorders, IntechOpen, UK (2018).
  10. 10.
    Contreras-Valenzuela, M.R., Lopez-Sesenes, R., Guzman-Clemente, A.D., Duque-Alvarez, A.E., Cuenca-Jimenez, F.: How poor workstation design causes musculoskeletal disorders: research from QOC matrix the workers’ voice. In: Parker, C. (ed.) Ergonomics - New Developments for Global Change, IntechOpen (2018).

Copyright information

© Springer Nature Switzerland AG 2020

Authors and Affiliations

  • Brenda Trujillo-Sandoval
    • 1
  • Martha Roselia Contreras-Valenzuela
    • 1
    Email author
  1. 1.Chemistry Sciences and Engineering CollegeAutonomous University of Morelos StateCuernavacaMéxico

Personalised recommendations