“…Quantifying failure costs (Elbireer et al, 2010); identifying hidden failure costs (Elbireer et al, 2010;Duarte et al, 2018) and the hidden components of quality costs (Cheah et al, 2011;Psomas et al, 2018); examining external failure costs or externalities (Peimbert-Garcia et al, 2016); focusing on the effectiveness of specific elements of prevention and appraisal cost (Plewa et al, 2016); examining which CoQ elements practitioners should focus on (Plewa et al, 2016) and the constituents of cost of quality (prevention, appraisal, failure costs) (Chatzipetrou and Moschidis, 2016); exploring which quality costs are monitored the most and which quality costs are constantly ignored (Chatzipetrou and Moschidis, 2017), the essence and the content of each individual quality cost (Chatzipetrou and Moschidis, 2017) and the quality cost components (Chatzipetrou and Moschidis, 2018); analyzing internal and external failure cost as a loss and not as a gain (Barouch and Bey, 2018); incorporating many CoQ elements in the analysis of CoQ (Psomas et al, 2018); determining the structure of the CoQ elements (Psomas et al, 2018); studying appraisal costs (Sawan et al, 2018)…”