“…It can be pointed out that there are positive relationships between coordination and control in the project carried out by the project management offices and the quality of project portfolio management (Unger, Gemünden and Aubry, 2012). As a result, the increase in quality of project management has a positive impact on success of the entire portfolio (Jonas, Kock and Gemuenden, 2012), which in this case is usually measured as effectiveness of the project in terms of costs, time and quality (Lindhard and Larsen, 2016). The tools and techniques of quality and operational excellence will play a particularly important role in the case of large infrastructure projects, under which they can ensure sustainable success of the undertaking (Basu, 2017).…”