Six Sigma Black Belt practice exam bank
The advanced layer: 100 questions at Black Belt depth — the statistics, the experimental strategy, the leadership and finance questions that separate BB papers from GB papers.
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What's inside
| Block | Questions | What it drills |
|---|---|---|
| Advanced statistics | 20 | Multiple comparisons, regression diagnostics, non-parametrics, intervals, power |
| Design of experiments | 20 | Resolution, aliasing, blocking, RSM, Taguchi, sequential strategy |
| Measurement systems | 10 | GR&R acceptance, bias/linearity/stability, attribute agreement, destructive MSA |
| SPC | 15 | Chart selection, EWMA/CUSUM, ARL, short runs, tampering, capability vs stability |
| DFSS + leadership + finance | 35 | DMADV, QFD, tolerance stacking, change leadership, hard vs soft savings |
The Black Belt difference
- Alias structures read fluently — resolution III vs IV confounding questions you can answer without pausing.
- Assumption awareness — when the t-test is wrong, why the Wald interval lies near zero, what pseudoreplication costs you.
- Leadership and finance — benefit registers, hard/soft/avoidance savings, stakeholder strategies — the exam section most engineers lose marks on.
- Worked explanations throughout — same discipline as the Green Belt bank, at depth.
Sit it honestly
Black Belt papers reward judgement as much as recall — read why each wrong option is wrong, not just the correct letter. Combined with the Green Belt bank (if you own both, revise GB first, then BB), you cover the full ladder.