“…However, for the industrial context, specialized websites (grey literature) make significant contributions to the quality from a practitioners' perspective. We found 49 (Vara and Marcos, 2012;Cuadrado et al, 2014;Hutchinson et al, 2014;Bertrand Portier, 2009;Haan, 2008;Whittle et al, 2014;Dubray, 2011;Linders, 2015;Tone, 2010;Finnie, 2015;Klinke, 2008;Vallecillo, 2014;Hebig and Bendraou, Industrial issue 02 (Brambilla and Fraternali, 2014;Lukman et al, 2013;Hutchinson et al, 2014;Torchiano et al, 2013;Mohagheghi et al, 2013b;Bertrand Portier, 2009;Whittle et al, 2014;Dubray, 2011;Klinke, 2008;Kulkarni et al, 2010;Vallecillo, 2014;Igarza et al, 2012;Aranda et al, 2012;Baker et al, 2005;Quora, 2014) Industrial issue 03 (Brambilla and Fraternali, 2014;Lukman et al, 2013;Bertrand Portier, 2009;Haan, 2008;Dubray, 2011;Corneliussen, 2008;Klinke, 2008;Kulkarni et al, 2010;Vallecillo, 2014;Mora et al, 2006;Ortiz et al, 2013;…”