“…In general, a number of different benefits are ascribed to certificates; however, a selection of slightly abbreviated titles of relevant research contributions over the past few years indicates that the value and the benefits of certificates in project management or similar fields of work in science and actual practice are being called into question (Catanio et al, 2013;Farashah et al, 2019;Cegielski, 2004;Coes and Schotanus, 2009;Mateyaschuk, 1998;Joseph and Marnewick, 2018) The central assumption regarding the value and the benefits of certifications in project management is that certified persons perform better in project management. However, so far there is only rudimentary evidence which suggests this (Catanio et al, 2013;Farashah et al, 2019;Coes and Schotanus, 2009;Joseph and Marnewick, 2018;Starkweather and Stevenson, 2011;Morris et al, 2006;Crawford, 2005;Fertig, 2009;Costello, 2009;Robin, 2011). A number of substantive and methodological problems make it difficult to prove value and benefits, such as questions like: What is "performance"?…”