Six Sigma Green Belt Prep

SIX SIGMA PREP: PASS YOUR ASQ GREEN BELT OR BLACK BELT EXAM

The ASQ CSSGB exam requires 550 of 750 points. The CSSBB is one of the most rigorous professional certifications in quality management. Candidates who fail are most often weak on statistical tools, selecting the correct control chart, and process capability calculations.

DMAIC PHASE REFERENCE

DEFINE: Project Charter (problem statement, goal, scope, team, timeline, financial benefit), SIPOC, VOC, CTQ tree. Gate deliverable: signed project charter. MEASURE: Process map, data collection plan, Gage R&R, process capability baseline (Cp, Cpk, Pp, Ppk), baseline sigma level. Gate deliverable: validated measurement system. ANALYZE: Fishbone diagram, 5 Whys, Pareto chart, hypothesis testing (t-test, ANOVA, chi-square), regression, FMEA (severity, occurrence, detection, RPN). Gate deliverable: verified root causes. IMPROVE: Brainstorming, poka-yoke, design of experiments (DOE), pilot testing, implementation plan. Gate deliverable: validated solution with pilot data. CONTROL: Control charts, control plan, standard operating procedures, response plan, project handoff to process owner. Gate deliverable: sustainable control system.

CONTROL CHART SELECTOR

Variables data: Xbar-R chart for subgroup size 2 to 10. Xbar-S chart for subgroup size greater than 10. I-MR chart for subgroup size of 1. Attributes data: p chart for proportion defective, varying subgroup size. np chart for number defective, constant subgroup size. c chart for defects per unit, constant area of opportunity. u chart for defects per unit, varying area of opportunity.

Special cause signals: single point beyond 3 sigma, 8 consecutive points same side of centerline, 6 consecutive points trending in one direction, 2 of 3 consecutive points beyond 2 sigma.

PROCESS CAPABILITY CALCULATOR

Enter process mean, standard deviation, USL, and LSL. Calculate Cp (equals USL minus LSL divided by 6 sigma), Cpk (minimum of USL minus mean and mean minus LSL, each divided by 3 sigma), Pp (using overall standard deviation), Ppk. Sigma level from Cpk and DPMO conversion included.

1,000+ PRACTICE QUESTIONS

OVERVIEW: SIX SIGMA AND ORGANIZATION (10%): History and principles, organizational goals, quality costs, team formation, project selection.

DEFINE PHASE (15%): Project charter, SIPOC, VOC, CTQ flowdown, QFD, project risk assessment.

MEASURE PHASE (20%): Data types (continuous vs discrete), sampling, Gage R&R, process capability (Cp, Cpk, Pp, Ppk, sigma level, DPMO), SPC basics.

ANALYZE PHASE (25%): Root cause tools, hypothesis testing (Type I and II errors, p-value), t-tests, ANOVA, chi-square, correlation and regression, FMEA.

IMPROVE PHASE (15%): Poka-yoke types (control, warning, shutdown), design of experiments, pilot planning.

CONTROL PHASE (15%): Control chart selection and interpretation, control plan, SPC signals, standard work documentation, project closure.

Every question includes a detailed explanation referencing the ASQ CSSGB Body of Knowledge.

FREE: 5 questions per day, DMAIC reference card, basic control chart selector. No account required.

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