“…The studies about 6σ are classified within the framework of descriptive, experimental, conceptual and literature review (Nonthaleerak & Hendry, 2006;Ninerola, Rebull & Lara, 2021). The method is described in the literature on the manufacturing sector (Koch, Yang, & Gu, 2004;Erdiller & Orbak, 2005;Hsu, Pearn, & Wu, 2008;Boangmanalu, Abigail, Sembiring, & Tampubolon, 2020;Sithole & Nyembwe, 2020;Rebull, et al, 2020) and service sector (Dakhil, 2019;Stanivuk, et al, 2020;Abid, et al, 2020;Ali, 2020) applications; in the context of its relationship with Total Quality Management (TQM) (Yang, 2004;Çalışkan, 2006;Bircan & Köse, 2012;Elmacı, Uslu, & Tutkavul, 2013) and lean (Edgeman & Bigio, 2004;Turan & Turan, 2019;Ikumapayi, et al, 2020;Gholami, et al, 2021;Costa, et al, 2021); it is also seen that it is the subject in conceptual and descriptive frameworks (Pyzdek, 2000;Rasis, Gitlow, & Popovic, 2002;Rowlands, 2003;Coronado & Antony, 2004;Antony, 2004;Ülgen, 2014;Uluskan, 2017). According to Kwalk & Anbari (2006) 6σ includes the combination of five methods; TQM or continuous quality improvement, customer focus, multiple analysis methods, financial performance and project management (Lee & Chang, 2012, p.453).…”