Effects of group size and learning on manual assembly performance: an experimental study

No Thumbnail Available
Journal Title
Journal ISSN
Volume Title
A1 Alkuperäisartikkeli tieteellisessä aikakauslehdessä
Degree programme
International Journal of Production Research, Volume 57, issue 2
In variable manual assembly production of highly customised products, effective allocation of workers to products is required. To support decision making here, industrial managers should be aware of the performance effects of the number of workers and learning within individual products. Evidence on such fundamental effects requires laboratory studies with products similar to those in real assembly industries. Because of the lack of such studies, this paper studies experimentally the effects of group size (one to four workers) and learning (up to four repetitions per group) on the performance of product assembly. The product, built for the purpose of the present study, consists of representative elements from real products in the mechanical engineering industry. A total of 68 undergraduate students participated in the experiments. The results from the experiments are in line with the hypotheses that the mean assembly time decreases at a decelerating rate as a function of both group size and repetitions, and that productivity per worker decreases as a function of group size. The results are explained in more detail through the experiences of the participants. Managerial implications and aspects for future research are also discussed.
Embargo 12 months
group size, learning, manual assembly, productivity, experimental study, mechanical engineering
Other note
Peltokorpi, J & Niemi, E 2019, ' Effects of group size and learning on manual assembly performance: an experimental study ', International Journal of Production Research, vol. 57, no. 2, pp. 452-469 . https://doi.org/10.1080/00207543.2018.1444810