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What do you need to do?
Quality engineering tools for SPC, capability, Gage R&R, 8D, FMEA and audits. Enter your data, get a clear verdict and a PDF report.
Is my process capable?Cp, Cpk, Pp, Ppk with control chartsCan I trust my gauge?Gage R&R, ANOVA methodSolve a customer complaint8D report with photos and PDFWhich defects first?Pareto chart, 80/20Find the root causeFishbone (Ishikawa) diagramAssess the riskFMEA with action priorityAudit a supplierVDA 6.3 process audit, grade A / B / CCheck the shop floorLayered process audit
All 22 tools
SPC and capability
- Process Capability & Control ChartsCp, Cpk, Pp, Ppk, PPM and confidence intervals with X-bar/R, X-bar/S or I-MR charts and all 8 Nelson rules.
- Attribute Control Chartsp, np, c and u charts for defectives and defects, including variable sample sizes.
- Capability SummaryCp, Cpk, Pp and Ppk for many characteristics in one table, ready for PPAP.
- Histogram and Normality TestHistogram, descriptive statistics, Anderson-Darling test and distribution fit.
Measurement systems (MSA)
- Gage R&R (MSA)Crossed study with ANOVA: repeatability, reproducibility, %GRR, % tolerance and ndc.
- Type 1 Gauge Study (Cg, Cgk)Cg, Cgk and bias test from repeated measurements of one master part.
- Gauge Linearity and BiasRegression of bias over the range with confidence band and t-tests.
- Attribute Agreement AnalysisAgreement and kappa for visual or go / no-go inspection.
Problem solving
- Pareto ChartSorted bars, cumulative line and the vital few behind 80 % of the problems.
- Fishbone DiagramIshikawa cause and effect diagram with 6M categories, PNG and SVG download.
- 8D ReportGuided D0 to D8 report with 5W2H, 5 Why, action tables and photos, exported to PDF.
- A3 ReportLean A3 report with photos and PDF, from background to results.
- SIPOC DiagramScope a process on one page: suppliers, inputs, process, outputs, customers.
Planning and risk
- FMEA WorksheetSeverity, occurrence and detection ratings with RPN, priority ranking and CSV export.
- Control PlanAIAG-style control plan, drafted from the FMEA, with CSV and PDF export.
- AQL Sampling PlanSample size, Ac / Re numbers and OC curve from lot size and AQL.
- Sample Size CalculatorParts needed for a Cpk study, a mean, a defect rate or a zero-failure test.
- Cpk, PPM and Sigma ConverterConvert Cpk, PPM, yield and sigma level, with or without 1.5 σ shift.
Audits
- Layered Process Audit (LPA)Shop-floor LPA checklist with OK / NOK, reactions, score and PDF.
- ISO 9001 Internal AuditClause 4 to 10 checklist with minor / major findings, actions and PDF.
- IATF 16949 Internal AuditAutomotive-specific requirements checklist with findings, actions and PDF.
- VDA 6.3 Process AuditP2 to P7 scoring, EG %, grade A / B / C with downgrade rules and PDF.
Private by design
Every calculation runs locally in your browser. Measurements, part numbers and FMEA content are never uploaded.
Validated statistics
Every engine is checked automatically against NumPy/SciPy and published reference values: 144 checks, see the validation report.
Paste and read
Copy a column from Excel, get the charts and a clear verdict immediately: capable or not, stable or not, acceptable or not.
Which quality tool do I need?
| Your question | Tool |
|---|---|
| Can my process meet the drawing tolerance? | Process capability (Cp, Cpk, Pp, Ppk) |
| Is my process stable over time? | X-bar R / I-MR control charts or p, np, c, u charts |
| Can I trust my gauge? | Type 1 study, Gage R&R, linearity and bias |
| Do my inspectors agree on pass / fail? | Attribute agreement analysis |
| Are all characteristics of my part capable? | Capability summary |
| How many parts should I inspect from a lot? | AQL sampling plan, sample size calculator |
| How do I control the process in series production? | Control plan |
| Which defects should I fix first? | Pareto chart |
| What could cause this problem? | Fishbone diagram |
| How do I document a customer complaint? | 8D report |
| How do I run an internal improvement project? | SIPOC, A3 report |
| What could go wrong and how bad would it be? | FMEA |
| Are the standards followed on the shop floor? | Layered process audit |
| Is our quality system ready for certification? | ISO 9001 and IATF 16949 internal audit |
| Is my supplier's process capable? | VDA 6.3 process audit |
A typical improvement loop uses several of them: a Pareto chart picks the problem, a fishbone diagram lists the possible causes, a Gage R&R confirms the measurement can be trusted, control charts and a capability study show whether the fix worked, and the FMEA keeps the risk under control afterwards.