Quality & Lean Six Sigma Suite
Industrial-grade statistical process control, capability analysis, hypothesis testing, DOE, and lean continuous improvement tools. All computations run 100% inside your browser.
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Statistical Process Control (SPC) 10 tools
Variables and attribute control charts, Nelson run rules, CUSUM, and EWMA monitoring.
X-bar and R Control Chart
Monitor process mean and range for rational subgroups of size 2 to 10 with Phase I & II limits.
X-bar and S Control Chart
Precision control chart for larger or variable subgroup sizes (n = 2 to 100) using sample standard deviation.
Individuals and Moving Range (I-MR) Chart
Process control chart for individual measurements (n = 1) with moving range span 2 and normality assessment.
p Chart for Fraction Defective
Attribute control chart for proportion of nonconforming items with variable subgroup sizes and optional Laney p-prime.
np Chart for Number of Defectives
Attribute control chart for the count of nonconforming units when inspection sample size remains constant.
c Chart for Count of Defects
Poisson attribute control chart for total number of nonconformities across a constant area of opportunity.
u Chart for Defects per Unit
Poisson rate control chart for nonconformities per unit with variable inspection areas or lot sizes.
Cumulative Sum (CUSUM) Chart
High-sensitivity tabular CUSUM chart with reference k and decision h values for small mean shifts (0.5 to 1.5 sigma).
Exponentially Weighted Moving Average (EWMA) Chart
Time-weighted control chart utilizing historical observations with weighting lambda and exact time-varying limits.
Control Chart Decision Wizard
Interactive question-driven selector guiding quality practitioners to the statistically correct control chart.
Process Capability & Measurement (MSA) 5 tools
Cp, Cpk, Pp, Ppk indices, crossed ANOVA Gage R&R, DPMO, and normality testing.
Process Capability Analysis (Cp, Cpk, Pp, Ppk, Cpm)
Comprehensive capability assessment comparing short-term within and long-term overall variation, confidence intervals, and PPM.
Gage R&R Study (Crossed ANOVA Method)
Evaluate measurement system repeatability and reproducibility via two-way crossed ANOVA, variance components, %Tolerance, and ndc.
Six Sigma Level, DPMO & Yield Calculator
Compute defects per unit (DPU), DPMO, rolled throughput yield (RTY), and exact process Z-score with 1.5 sigma shift options.
Attribute Agreement Analysis (Attribute MSA)
Evaluate qualitative visual inspections using Cohen and Fleiss kappa statistics, within/between appraiser consistency, and standard agreement.
Normality Assessment & Probability Plot
Test distribution normality via Anderson-Darling A2* test, Shapiro-Wilk approximations, and interactive normal probability plots.
Acceptance Sampling 2 tools
Single-sampling plan design (AQL, LTPD), operating characteristic (OC) curves, and MIL-STD-105E tables.
Acceptance Sampling Plan Designer (n, c)
Design single-sampling plans matching AQL, LTPD, Producer (alpha) and Consumer (beta) risks using Binomial, Hypergeometric, and Poisson models.
MIL-STD-105E Sampling Table Lookup
Public domain MIL-STD-105E table inspection lookup for normal, tightened, and reduced sampling with switching rules.
Lean & Continuous Flow 8 tools
Takt time, line balancing heuristics, Kanban WIP calculation, time studies, and OEE.
Overall Equipment Effectiveness (OEE) & TEEP
Precision calculation of Availability, Performance, Quality, OEE, and TEEP with Six Big Losses waterfall breakdown.
Takt Time, Cycle Time & Staffing Calculator
Synchronize production pace with customer demand, calculate line operator staffing requirements, and visualize Yamazumi balance.
Assembly Line Balancing & Efficiency Optimizer
Task precedence graph editor with Ranked Positional Weight (RPW) heuristics and exact branch-and-bound solver up to 20 tasks.
Value Stream Map (VSM) Lead Time Analyzer
Map process steps, inventory buffers, cycle times, changeovers, and calculate Process Cycle Efficiency (PCE).
Kanban Sizing & Little's Law WIP Calculator
Size production Kanban loops using demand, lead time, and safety factors; apply Little's Law (WIP = Throughput x Lead Time).
Time Study & Standard Time Calculator
Calculate normal time, performance ratings, fatigue/delay allowances, and required statistical sample size for work measurement.
SMED Quick Changeover Analyzer
Single-Minute Exchange of Die (SMED) worksheet categorizing internal vs. external setup elements and conversion savings.
5S Workplace Organization Audit Scorecard
Standardized 5S audit checklist across Sort, Set in Order, Shine, Standardize, and Sustain with radar chart scoring.
Problem Solving & Improvement 10 tools
FMEA (RPN & Action Priority), Pareto analysis, 8D report, 5-Why, Fishbone, and COPQ models.
FMEA Builder (Classic RPN & Action Priority)
Failure Mode and Effects Analysis (DFMEA & PFMEA) with customizable Severity, Occurrence, Detection scales and Action Priority (H, M, L).
Pareto Analysis (80/20 Rule) Chart
Interactive Pareto chart with automatic frequency sorting, cumulative percentage ogive curve, 80% threshold marker, and CSV import.
8D Problem Solving Report Builder
Comprehensive 8 Disciplines problem-solving document generator from D0 (Plan) to D8 (Recognize Team) with exportable PDF report.
5-Why Root Cause Branching Analyzer
Multi-branch iterative root cause analysis with logic validation checklist, causal chain backtracking, and countermeasure tracking.
Ishikawa Fishbone Diagram (Cause & Effect)
Interactive Cause and Effect diagram supporting standard 6M (Manufacturing) and 8P (Services) categorization presets with SVG export.
Cost of Poor Quality (COPQ) Calculator
Classify quality financial expenditures into PAF model (Prevention, Appraisal, Internal Failure, External Failure) with % Sales benchmarks.
A3 Problem Solving & Project Sheet
Lean Toyota-style single-page A3 project worksheet covering Background, Current Condition, Target, Root Cause, Countermeasures, and Results.
Process Control Plan (PCP) Builder
Author APQP process control plans directly linked to PFMEA characteristics: specifications, measurement methods, sample frequencies, and reaction plans.
DMAIC Six Sigma Project Charter Builder
Structured charter tool with SMART checks on problem/goal statements, project scope in/out boundaries, team roles, and financial benefits.
SIPOC High-Level Process Map
Define process boundaries across Suppliers, Inputs, Process steps, Outputs, and Customers with clean SVG and PDF vector export.
Statistics for Improvement 4 tools
Sample size and statistical power, hypothesis test wizard, 2-level factorial DOE, and regression.
Statistical Sample Size & Power Calculator
Exact noncentral-t sample size calculations for 1-sample and 2-sample t-tests, proportions, one-way ANOVA, and confidence interval half-widths.
Hypothesis Testing Decision Wizard & Solver
Question-driven solver for 1-sample, 2-sample Welch t-tests, paired t, one-way ANOVA with Tukey post-hoc, proportion tests, and Chi-square.
DOE 2-Level Factorial Designer & Analyzer
Design and analyze 2^k full and fractional factorial experiments (up to 7 factors), resolution III/IV/V generators, alias structure, and Pareto of effects.
Linear & Multiple Regression Analysis
Simple and multiple linear regression by Householder QR decomposition, ANOVA table, R-sq, Adj R-sq, VIF collinearity check, and residual plots.