Enhancing Quality Control in Bottled Water Production

This study investigates the weight consistency of half-liter bottled water produced by three local bottling plants (CNO, Shaimaa, and Dijla) using statistical quality control methods. Analysis of twelve samples from each plant revealed significant variability in bottle weights. Shaimaa exhibited the highest mean weight) (504.58 grams) and the most consistent production process. ANOVA and post-hoc tests confirmed significant differences in mean weights among the plants (p < 0.0001), with Shaimaa producing significantly higher weights compared to CNO and Dijla. Process capability analysis (Cpk) indicated that none of the plants consistently met weight specifications, highlighting the need for process improvements. These findings underscore the importance of rigorous quality control practices and continuous process improvement to ensure product consistency and meet customer expectations.