“COMMON FAILURE FACTORS OF LEAN SIX SIGMA AND QUALITY 4.0, IN INDUSTRY 4.0 SERVICE SECTOR”, IJSSB, vol. 3, no. 10, pp. 24–36, Oct. 2025, Accessed: Oct. 09, 2025. [Online]. Available: https://ijssbulletin.com/index.php/IJSSB/article/view/1292