Hapsari, Kartika, and Ajeng Sukaena Beddu. “ANALYSIS OF FACTORS CAUSING DEFECTS IN REINFORCED CONCRETE STRUCTURES USING SIX SIGMA”. Jurnal Ilmiah Teknologi Infomasi Terapan, vol. 12, no. 3, Aug. 2026, doi:10.33197/jitter.vol12.iss3.2026.3695.