“…A hierarchical level of a barrier place of occurrence is also used as a basis for barriers classification: see, for example, the categories of “individual or organizational level” in Riege (2005) or “personal, team, organizational and external level” (Olaniran, 2017). An hierarchical classification, however, is rather relative than absolute, depending from the researched organization's size and organizational structure (Al Saifi, Dillon, & McQueen, 2016; Paulin & Suneson, 2012): as barriers of individual and organizational level (as well as of external) can be described in all organizations, degree of manifestation of group level barriers (e.g., division of a collective into antagonistic informal subgroups) surely does depend on the organization's size (Burgess, 2005) and organizational structure centralization (Duchek, 2015; Garud & Kumaraswamy, 2005).…”