QUALITY ENGINEERING PLATFORM

Every tool for
quality excellence
in one vault.

Spreadsheets, apps, and resources for Six Sigma, Lean, DMADV, Kaizen, and Reliability Engineering — built for practitioners by practitioners.

⬇ Browse Tools Explore Disciplines →

60+ Tools & Templates

8 Disciplines

40+ Stat Tests

// Disciplines

Every methodology.
Every tool.

From Define to Control, from FMEA to Weibull — Quality Vault covers the full spectrum of modern quality and reliability engineering.

DMAIC methodology with complete toolsets for Define, Measure, Analyze, Improve, and Control phases.

SIPOCMSAGauge R&RProcess CapabilityFMEA

Combine waste elimination with variation reduction. VSM, 5S, Takt time, and OEE integrated with SPC.

VSM5S AuditOEETakt TimeKanban

Design for Six Sigma — build quality in from the start. QFD, CTQ trees, transfer functions, and tolerance design.

QFDCTQ TreeTRIZPugh MatrixDOE

Continuous improvement events, A3 reports, rapid improvement worksheets, and Gemba walk tracking tools.

A3PDCA5 WhysFishboneGemba

Reliability Engineering

FMEA, FTA, FRACAS, system reliability modeling, and life data analysis including Weibull distributions.

WeibullCrow-AMSAAFRACASFTARBD

Statistical Analysis

Full suite of parametric and non-parametric hypothesis tests, regression, DOE, and distribution analysis apps.

t-testANOVAMann-WhitneyChi-SquareRegression

All major SPC chart types with Western Electric and Nelson rules auto-detection. Variables and attribute data.

X-bar RIMRp-chartCUSUMEWMA

Measurement Systems

Complete MSA toolkit — Gauge R&R (ANOVA & Average/Range), linearity, stability, and attribute agreement analysis.

Gauge R&RLinearityBiasAttribute MSA

// Featured Tools

Download. Open. Analyze.

Spreadsheets, interactive apps, and calculators ready to use on day one.

Process Capability Calculator

Cp, Cpk, Pp, Ppk with histogram, normal probability plot, and automatic spec interpretation. Handles non-normal data with Johnson transformation.

Gauge R&R (ANOVA Method)

Full crossed and nested Gauge R&R study with ANOVA decomposition, %Contribution, %Study Variation, and ndc output with visual components breakdown.

Design & Process FMEA with RPN calculation, risk matrix visualization, action tracking, and automatic high-RPN flagging per AIAG/VDA standards.

Hypothesis Test Advisor

Guided wizard selects the right test for your data type, sample size, and assumptions. Runs the test and interprets p-values, effect sizes, and power.

DOE Full Factorial Designer

2k and 3k full factorial designs with randomization, ANOVA, main effects and interaction plots, and optimized response surface output.

Weibull Analysis App

2 and 3-parameter Weibull fit with MLE and median rank regression, B10/B50 life calculation, confidence bounds, and probability plot output.

Value Stream Mapping Template

Current and future state VSM with automatic takt time, cycle time, and VA ratio calculations. Kaizen burst markers and improvement roadmap.

QFD / House of Quality

Complete HOQ matrix with customer voice, engineering characteristics, correlation matrix, competitive benchmarking, and prioritization waterfall.

OEE Calculator & Dashboard

Overall Equipment Effectiveness with Availability, Performance, and Quality decomposition. Pareto of losses and trend tracking by shift/line.

// Statistical Testing

Parametric &
Non-Parametric
hypothesis tests.

Every test you need — from the classic two-sample t-test to Kruskal-Wallis and beyond. Each tool guides you through assumptions, runs the test, and explains the results.

Launch Test Advisor →

1-Sample t-Test
Parametric
2-Sample t-Test
Parametric
Paired t-Test
Parametric
One-Way ANOVA
Parametric
Two-Way ANOVA
Parametric
Mann-Whitney U
Non-Param
Wilcoxon Signed Rank
Non-Param
Kruskal-Wallis
Non-Param
Mood's Median Test
Non-Param
Chi-Square (GOF & Assoc.)
Non-Param
Levene's / Bartlett's
Variance
F-Test Equal Variances
Variance

// SPC Control Charts

Every chart type, built-in rules.

Western Electric, Nelson, and WECO rules with automatic signal detection. Variables and attribute data. Phase I and Phase II analysis.

X-bar & R Chart

Subgroup means and ranges. Classic variables chart for subgroup data n=2–10.

X-bar & S Chart

Subgroup means and standard deviations. Preferred for larger subgroup sizes n>10.

Individuals & MR Chart

Individual measurements with moving range. For continuous process data with n=1.

Exponentially weighted moving average. Detects small sustained process shifts.

Cumulative sum chart. Optimal for detecting small mean shifts with tabular method.

Proportion nonconforming. Attribute chart for variable subgroup sizes.

Number nonconforming. Attribute chart for constant subgroup size.

Defects per unit (u) and total defects (c) for count/Poisson data.

// Reliability Engineering

Life data analysis.
Failure prediction. FRACAS.

From accelerated life testing to fleet reliability growth — complete tooling for reliability practitioners.

Weibull Life Data Analysis

Fit 2 and 3-parameter Weibull distributions to failure data. Determine characteristic life, shape parameter β, scale parameter η, and B-life estimates.

MLE and Median Rank Regression fitting Confidence bounds (Fisher Matrix & Likelihood Ratio) B10 / B50 / BX life calculations Suspensions and interval censored data Probability, PDF, CDF, and Hazard plots

02 / CROW-AMSAA

Crow-AMSAA Reliability Growth

Track and project reliability growth during development and fielded systems. NHPP Power Law model with MLE parameter estimation and growth projection.

Time-terminated and failure-terminated tests Failure intensity and MTBF plots Laplace trend test for growth verification Projected MTBF at future time Multiple system fleet analysis

03 / FMEA & FTA

FMEA / Fault Tree Analysis

Design and Process FMEA with RPN and criticality matrix. Fault tree analysis with Boolean logic gates and minimal cut sets for system reliability.

AIAG/VDA FMEA format support Criticality analysis (MIL-STD-1629A) Qualitative and quantitative FTA Minimal cut set calculation

04 / FRACAS & RBD

FRACAS & System Reliability

Failure Reporting, Analysis and Corrective Action System template with Reliability Block Diagrams for series, parallel, and k-of-n configurations.

Closed-loop FRACAS workflow template Series, parallel, and complex RBD System MTBF / MTTF calculation Availability and maintainability modeling

// External Resources

Curated reference links.

Hand-picked standards bodies, training resources, software, and reference sites for quality professionals.

ASQ — American Society for Quality

Certifications, standards, publications, and the premier quality professional community.

Articles, tools, forums, and community for Six Sigma practitioners at all belt levels.

Comprehensive reliability engineering reference — Weibull, RGA, FMEA, and accelerated testing theory.

qualitydigest.com

Industry news, SPC guides, and technical articles on quality methods and standards.

NIST/SEMATECH e-Handbook

The definitive free reference for statistical methods in engineering and science.

Industry-standard statistical software. Free companion tutorials to Quality Vault tools.

Lean Enterprise Institute

Books, training, and frameworks for lean thinking, VSM, and continuous improvement.

SAE International

Standards for automotive and aerospace quality engineering including APQP and PPAP.