Batch Cpk analysis for every characteristic — in one minute
Paste your Excel data and get Cp, Cpk, Pp, Ppk, expected PPM, control charts and a PDF report for every characteristic at once. One HTML file, no installation, runs fully offline.
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Watch the 35-second demo
What you get
- Batch capability analysis — Cp, Cpk, Pp, Ppk, Cpm, expected and observed PPM and a verdict for every column you paste, in one sortable table.
- Spec limits from your sheet — LSL / USL / Target rows above the data are read automatically. One-sided specs supported.
- Charts for each characteristic — histogram with normal fits, I-MR or X̄-R control chart (subgroups 2–10), Nelson rules 1–4.
- Compare all — every distribution side by side to spot problems at a glance.
- One-click PDF report — summary page plus one page per characteristic, with your title and name.
- CSV export and an English / Korean interface.
Private by design
All calculations run inside your browser on your own computer. Nothing is uploaded, there is no account and no internet connection is needed — so it is safe for confidential production data and air-gapped networks.
Accurate and transparent
Formulas follow the AIAG SPC manual (within σ: MR̄/d₂ or R̄/d₂; overall σ: sample standard deviation). The calculation engine is validated against an independent Python/SciPy implementation, agreeing to within 1e-9 relative error. You can check the method first with the free single-characteristic calculator.
What's in the download
SPC-Tools-Pro.html— the application (open with Chrome or Edge, Windows or Mac)- Excel input template with example data
- Quick-start guide (English / Korean)
FAQ
Do I need to install anything?
No. Double-click the HTML file and it opens in your browser.
Can my colleagues use it?
Yes — the license covers the purchaser and internal use within their company. Redistribution or resale is not allowed. See the license terms.
What if it doesn't work for me?
Email us within 14 days of purchase and we will help or refund you in full. See the refund policy.
How are updates delivered?
New versions (Gage R&R is next) are free for existing customers and sent to the email used at purchase.
Questions? anon87993@gmail.com