TY - CPAPER AU - Grazyna Wojcik TI - SIX SIGMA AS THE METHOD OF PROCESSES- EFFICIENCY IMPROVEMENT IN ENERGY INDUSTRY T2 - SGEM International Multidisciplinary Scientific GeoConference EXPO Proceedings; SGEM2017 17th International Multidisciplinary Scientific GeoConference PY - 2017 SP - 773 EP - 780 DO - 10.5593/sgem2017/53/s21.096 PB - STEF92 Technology ER -