Penerapan Six Sigma Terhadap Peningkatan Kualitas dan Efisisensi di Lembaga Pelayanan Pendidikan ITTP - Abelia, Hanida; Wati, Timaya; Hanifah, Hanin; Kusumawardani, Dwi (Proceedings of the National Conference on Electrical Engineering, Informatics, Industrial Technology, and Creative Media, 2024)