“…Ergonomics (Arnoud, 2013 ;Motté & Haradji, 2010 ;Petit, 2005) and management (Lorino, 2009(Lorino, , 2013Lorino & Peyrolle, 2005 ;Lorino & Tricard, 2012) have gradually highlighted and conceptualized this new form of activity which takes place at the heart of this crossfunctional process. Whether we refer to this activity as "cross-functional collective activity" (Motté & Haradji, 2010) or "joint collective activity" (Lorino, 2009(Lorino, , 2013Lorino & Peyrolle, 2005), it remains the same type of activity taking place across the company as a whole. It is a collective activity "where different actors are required to do different things in a coordinated manner in order to produce a result through the complementarity of their involvement" (Lorino & Peyrolle, 2005, p. 224).…”