Laundry detergents commonly have alkaline properties to remove the grease and stains off of our clothing. A household products company aim to produce detergents that have a pH level between 10 and 11. After recording the pH level of 30 samples, they concluded that their manufacturing process is stable but incapable as some samples are found either below or above the specification limits. This results in low Cpk (0.391) and Ppk (0.439) values.