Several sequences of observations were carried out to capture the actual activity of LIB manufacturing. In order to collect the most reliable data, we asked a post-doctoral researcher to manufacture a battery on the pilot line of our laboratory, and filmed all her communications, movements and tasks. We recorded this activity twice, one month apart, to identify possible variations in the conditions under which the task was performed. The data collected was used to describe and explain how the experimenters went about carrying out the tasks. In order to find out more about the sequences of the tasks, the distribution of functions between people and machines, the layout of the workplace and training needs. Each stage of the battery cell manufacturing was recorded and then analyzed with the Boris software .