Experience can be defined as a simultaneous transformation of activity and of the subject-in-activity. It has three interdependent social forms of emergence: lived experience, represented experience and communicated experience. There are three main ways of accessing it: recall, recounting and confrontation with traces of activity. To access the experience in the making, the privileged moments are the moments of transformation of the experience, marked by uncertainty, agitation and emotion; these can be described as "tipping points". They open up clusters of activity that can be identified as being organised around five functions: alerting, taking stock, putting things into perspective, embedding-concatenating, formalising. Translated with DeepL.com (free version)