Dini, Karina, Evelin Nuga Fitrah, & Fachrur Rozi.
" Implementation of Generalized Variance and T2- Hotelling Control Charts for Monitoring the Water Quality Characteristics at the Perumda Air Minum Tugu Tirta Kota Malang." <em>Proceedings of the International Conference on Green Technology</em> [Online], 15.1 (2025): n. pag. Web.  1 May. 2026