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For K-12 Students · SPC Control Chart

SPC Control Chart for a welding cell

Built for k-12 students learning it in middle or high school. Watch the idea come alive with plain-language steps and everyday examples — perfect for projects and homework. Simulate a welding cell live below — adjust the inputs and watch it respond, right in your browser.

SPC Control ChartLive

Controls

Presets

Statistical process control watches a process over time against control limits set at three standard deviations from the target. Points inside are normal random variation — leave them alone. A point beyond the limits, or a run trending one way, signals a real change worth investigating. Nudge the process shift and watch points breach the limits.

▶ Run in Python

Data Inspector

Center line50
Control limits±3σ (44–56)
Out of control0

Governing equation

Reading this result: The process is centered on target: points scatter randomly inside the ±3σ limits, so every point is just noise — reacting now would only add variation (tampering).

Runs locally in your browser — free forever. Scale to the cloud when reality gets heavy.

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Frequently asked questions

Is this good for k-12 students?
Yes — this version of "SPC Control Chart for a welding cell" is framed for k-12 students learning it in middle or high school. Watch the idea come alive with plain-language steps and everyday examples — perfect for projects and homework.
Do I need to install anything?
No. It runs in any modern browser, free, with no account required.