THE APPLICATION OF SELECTED QUALITY TOOLS IN ANALYSING THE REASONS FOR DISCREPANCIES IN WET REFRACTORY MORTAR MANUFACTURE. - KIEĆ, Monika; BUGDOL, Marek (Scientific Papers of Silesian University of Technology. Organization & Management / Zeszyty Naukowe Politechniki Slaskiej. Seria Organizacji i Zarzadzanie, 2019)