Syafiqri Alfarizki, and Gatot Yudoko. “IMPROVING SALES FORECAST ACCURACY USING LEAN SIX SIGMA: A CASE STUDY IN THE FMCG INDUSTRY”. Multidiciplinary Output Research For Actual and International Issue (MORFAI), vol. 6, no. 3, Feb. 2026, pp. 3270-89, doi:10.5281/zenodo.18951337.