ChartSays

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ChartSays is a browser-based statistical analysis tool for Six Sigma, quality engineering and business analysis. It covers dozens of methods, including process capability (Cp, Cpk, Pp, Ppk), control charts, Gage R&R/MSA, DOE, regression, ANOVA, hypothesis tests and reliability, with charts, statistical results and downloadable reports. Free in-browser calculators for Cpk, I-MR control charts and Gage R&R work with no sign-in. Upload CSV, XLSX, TSV or TXT data to the full workspace. Built for quality engineers and consultants who want transparent calculations without installing desktop statistics software.