Knowledge centre · Measure
Measure tool guides
Forty guides for collecting trustworthy data, understanding variation and establishing current performance. Choose methods that fit the measurement question and assumptions.
Measure · 01
Output measurement matrix
A requirement-to-measure table with definitions, targets, sources and owners.
Measure · 02
Collect Data
A traceable dataset collected under agreed rules, with deviations and missingness recorded.
Measure · 03
Operational Definition
A tested instruction that enables consistent observation or calculation.
Measure · 04
Data Source
A documented source decision with field meanings, coverage and validation findings.
Measure · 06
Data Collection Forms
A tested recording form with clear instructions and exception handling.
Measure · 07
Sampling Strategy
A justified sampling design with coverage, size rationale and selection records.
Measure · 08
Measurement System Analysis (MSA)
Evidence about measurement suitability, with limitations and actions recorded.
Measure · 09
Gage R&R for discrete (binary) data
An attribute agreement assessment with error direction and study limitations.
Measure · 10
Measurement System Analysis Type I
A one-reference repeatability and bias assessment under documented conditions.
Measure · 11
Measurement System Analysis Type II
A documented continuous Gage R&R study with components, metric definitions and decisions.
Measure · 12
Linearity Study and Systematic Measurement Deviations
A bias-versus-reference assessment with uncertainty and corrective decisions.
Measure · 13
Test the Quality of Available Data
A data-quality report and reproducible cleaning record supporting the baseline.
Measure · 14
Data Collection Plan
An agreed and trialled collection plan with responsibilities and validation checks.
Measure · 15
Understanding Variation
A reasoned view of process variation with evidence-based investigation priorities.
Measure · 20
Histogram
A numerical distribution display with explicit interval rules and contextual interpretation.
Measure · 21
Box Plot
A labelled group distribution summary with stated quantile and whisker conventions.
Measure · 22
Run Chart
A time-ordered plot with contextual annotations and cautious pattern interpretation.
Measure · 23
Control Charts
An appropriate stability chart with documented baseline, assumptions and signal response.
Measure · 26
Location Parameter Mean Value
A correctly calculated mean with units, coverage and distribution context.
Measure · 27
Location Parameter Median
A median with clear data coverage and an appropriate interpretation.
Measure · 29
Spread Parameter Standard Deviation
A labelled spread estimate with units and intended use made clear.
Measure · 32
Process Performance
A trustworthy performance baseline with coverage, uncertainty and guardrails.
Measure · 33
Defects per Million Opportunities (DPMO)
An opportunity-based defect rate with a transparent denominator.
Measure · 37
Span, Percentile Distance
A named percentile distance with a reproducible calculation method.
Measure · 38
Data Transformation
A documented scale transformation with a justified analysis and interpretable results.
Measure · 39
Process Capability and Process Stability
A requirement comparison supported by explicit stability and model checks.
Measure · 40
Cp and Cpk values
A capability assessment with genuine specifications and documented assumptions.