Free tool
Live control chart
Drop in a CSV. The chart, the control limits and the out-of-control points are worked out in your browser.
defects_line3_may.csv
n = 12Mean = 7.50UCL = 13.55LCL = 1.451 out of control
Special-cause signal detected. 1 point breached the control limits — the process isn't stable; investigate before judging capability.
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