M.D. Khawla Radi Athab; Hayder Hamzah Saleeh; Dr. Laith Ali Muttar. THE APPLICATION OF THE SIX SIGMA METHOD IN REDUCING QUALITY FAILURE COSTS A CASE STUDY IN A DIWANIYAH TEXTILE FACTORY. Amer. Jour. of Rese. in Human. and Soci. Scie. 2023, 12, 76-103.