SPC & Process Capability
Chart the process, tell signal from noise, and state whether it can hold tolerance.
Quality & Continuous Improvement
Plot an X-bar and R control chart from measured subgroups: centre lines, control limits from the standard A2, D3, D4 and d2 constants, out-of-control points and runs of seven, with the process sigma estimated from the average range. Type the readings in or import a spreadsheet. Nothing is uploaded.
Quality & Continuous Improvement
Enter your measured readings and a specification, and get the whole capability picture: mean, sigma, Cp, Cpk, Cpu, Cpl, Pp, Ppk, an estimated defect rate in parts per million, a histogram against the limits and a run chart that shows the drift an average hides. Type the readings in or import a sprea
Quality & Continuous Improvement
Plot single measurements as an I-MR control chart: control limits from the moving range, four run rules, and capability against your specification. Refuses to draw limits from too little data. Runs entirely in your browser. Nothing is uploaded.
Not built yet
The rest of this workflow, in the order we think it is worth building. If you need one of these, say so — requests decide the order.
- P Chart
- NP Chart
- C / U Chart
- Capability Trend Dashboard