The students enjoyed the activity, in spite of complaining about the amount of data that should be collected. This was due to the coincidence of this activity with the end-of-year exams. They suggested the development of this activity along one semester which would allow more commitment and attention; • It was not difficult for them to understand some basic concepts, such as process, operation, conversion and flow activities: they easily identified them through process mapping and flowchart; • But neither of them could apply the lean construction principles and approaches to explain or to solve the problems observed on site: the theme is complex and requires a detailed observation of processes with a systemic view.