Six Sigma canon (Motorola/GE)Standard improvement roadmap
Define the problem, Measure current performance, Analyse root causes, Improve the process, Control the gains — the closed-loop cycle for improving existing processes.
W. Edwards Deming (precursor)PDSA cycle
DMAIC extends the Plan-Do-Study-Act learning loop: improvement is iterative hypothesis-testing on the process, never a one-off fix.
The EclipseFrontiers® LensA problem defined loosely returns twice.