Links stratification with check sheets and Pareto: stratify first, then rank. Includes dimension checklists and layout examples.
Teach one overall chart → three drill-down layers; learners stratify a defect count dataset on two dimensions live.
Use outputs in MS meetings and audit prep.
Over-stratification fragments samples; too-coarse layers hide differences.
Align dimensions with accountability — do not mislabel management issues as equipment issues.