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Effect of Giving Feedback on Postural Working Techniques
Nafise Mahdavian, Carl Mikael Lind, Jose Antonio Diaz Olivares, Aitor Iriondo Pascual, Dan Högberg, Erik Brolin, Liyun Yang, Mikael Forsman, Lars Hanson
Working postures and movements affect work efficiency and musculoskeletal health. To reduce the biomechanical exposure in physically demanding settings, working techniques may be improved by giving instant ergonomic feedback to the operator. This study investigates if feedback can be used to decrease adverse postures and movements in assembly work. A prototype solution of a smart textile workwear was used on a trainee assembly line. Posture and movement signals of 24 trainee operators were sampled via the workwear, transferred to a tablet for analyses and used to provide feedback suggesting improvements of work technique. Two modes of feedback were tested. Every participant's work technique was measured before and after receiving the feedback and the results were compared. For upper arm elevation angle ≥60°, behaviour change is indicated, supporting a positive work technique change, and indicated a future usefulness of technical automatic feedback for operators.
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