← Home
› SPC & Quality
Variables Control Charts
X-bar & R, X-bar & S, and I-MR charts for continuous measurement data. Includes Western Electric / Nelson rules for out-of-control detection.
CHART OPTIONS
📋Data format: CSV — rows = subgroups, columns = measurements within subgroup. First row = header (optional numeric). For I-MR: single column of individual measurements.
📥 Data
Data Grid
Edit cells directly. Click 'Apply to CSV' to transfer data.
AI Interpretation
Attributes Control Charts
p-chart, np-chart, c-chart, and u-chart for defect and defective data. Includes Nelson rules.
CHART OPTIONS
📋Data format: CSV — for p/np: Inspected,Defective. For c: Defects (single column). For u: Units,Defects.
📥 Data
Data Grid
Edit cells directly. Click 'Apply to CSV' to transfer data.
AI Interpretation
CUSUM Chart
Tabular Cumulative Sum chart for detecting small sustained shifts in the process mean. Two-sided with C+ and C- statistics.
PARAMETERS
📋Data format: Single column of sequential measurements. First row = header (optional).
📥 Data
Data Grid
Edit cells directly. Click 'Apply to CSV' to transfer data.
AI Interpretation
EWMA Chart
Exponentially Weighted Moving Average chart with exact and steady-state control limits. Good for detecting small shifts.
PARAMETERS
📋Data format: Single column of sequential measurements.
📥 Data
Data Grid
Edit cells directly. Click 'Apply to CSV' to transfer data.
AI Interpretation
Run Chart
Time-ordered plot with runs analysis (above/below median). Four pattern tests: too few/many runs, trends, oscillation.
DATA
📋Data format: Single column of time-ordered measurements.
📥 Data
Data Grid
Edit cells directly. Click 'Apply to CSV' to transfer data.
AI Interpretation
Process Capability Analysis
Full capability study: Cp, Cpk, Pp, Ppk, Cpm, Cpmk, sigma level, PPM defective, with normality test and histogram.
SPECIFICATIONS & DATA
(unchecked = ISO/academic short-term sigma)
📋Data format: Single column of measurements (or rows of subgroups for within-subgroup sigma estimation).
📥 Data
Data Grid
Edit cells directly. Click 'Apply to CSV' to transfer data.
AI Interpretation
Capability Indices Calculator
Interactive calculator and benchmark comparison for Cp, Cpk, Pp, Ppk with visual gauge and industry benchmarks.
CALCULATOR
AI Interpretation
Gauge R&R — ANOVA Method
Two-way ANOVA method for measurement system analysis. Decomposes variance into repeatability, reproducibility, part, and operator-part interaction.
DATA & OPTIONS
📋Data format: CSV — Operator,Part,Measurement. Typical: 3 operators, 10 parts, 2-3 replicates each.
📥 Data
Data Grid
Edit cells directly. Click 'Apply to CSV' to transfer data.
AI Interpretation
Gauge R&R — Xbar & Range Method
Classical AIAG short method: EV, AV, GRR, PV, TV computed from range statistics. No ANOVA required.
DATA & OPTIONS
📋Data format: CSV — Operator,Part,Measurement.
📥 Data
Data Grid
Edit cells directly. Click 'Apply to CSV' to transfer data.
AI Interpretation
Bias & Linearity Study
Assess measurement system bias at multiple reference points and linearity of the bias across the measurement range.
DATA
📋Data format: CSV — Reference,Measured. Multiple measurements per reference value for repeatability.
📥 Data
Data Grid
Edit cells directly. Click 'Apply to CSV' to transfer data.
AI Interpretation