EXIN LSSA Six Sigma Green Belt cheat sheet

Charter: business case, problem, goal, scope, team, milestones, benefit.

Problem statements quantify the gap without cause or solution.

Goals are SMART and tied to a CTQ.

SIPOC helps set scope and process boundaries.

VOC must be segmented and translated into measurable CTQs.

Stakeholders and risks belong in Define, not only in Improve.

Operational definitions make baseline data reproducible.

MSA must precede capability analysis.

Gage R&R under 10% is acceptable; over 30% is not.

Stability comes before Cp/Cpk.

Cpk accounts for centering; Cp does not.

Report sigma level or DPMO with the opportunity definition.

Analyze verifies causes; fishbone and 5 Whys only generate hypotheses.

Stratification often explains more than a global test.

Match the hypothesis test to data type and group structure.

Check assumptions before trusting p-values.

Report effect size and confidence intervals.

Statistical significance is not the same as practical significance.

Solutions must link to verified root causes.

Pilot with success criteria before full rollout.

DOE needs randomization, replication, and blocking where relevant.

Control plans specify monitoring, frequency, owner, and reaction.

SPC limits come from stable process data, not specifications.

Handover to the process owner is required to sustain gains.