Our questions are sourced.
Check them.
My name is Clément Rat, I am a Lean Six Sigma Black Belt and I review beltup’s questions. Each one carries the reference it rests on, and that reference is shown to the learner at marking.
You do not have to take my word for it: the full list is below, and the figures that follow are read from the database on every visit.
2,480
questions in the bank
2,480
carry a reference
2,119
backed by a standard or a book
2,255
reviewed and validated
And 361 questions have no published source. They are professional practices — team meetings, shop-floor indicators — that no standard and no book lays down. They carry the note “no normative source cited” rather than a convenient reference. You will see it displayed as is during the quiz.
What I claim, and what I do not claim
A cited standard is cited at document level: it names the reference that is authoritative on the subject, not a specific paragraph. You will never find a “§5.3” here meant to impress.
A cited book names the origin of the method taught. That Shigeo Shingo founded SMED in A Revolution in Manufacturing is a verifiable fact; I do not claim to have checked every statement against a page of his book.
The documents listed below are those I hold a copy of. A reference I do not have in hand does not appear on this page — the rule is set in the database, not in the code of this page.
Where to check, concretely
Here is a question from the bank, as it appears once answered.
Que compare fondamentalement un indice de capabilité ?
La moyenne du procédé et la valeur cible fixée par le client
Le nombre de pièces bonnes et le nombre de pièces produites sur la période
La performance actuelle et la performance passée du même procédé
La dispersion naturelle du procédé et l'intervalle de tolérance autorisé
L'idée tient en une image : la largeur de ce que le procédé sait faire, rapportée à la largeur de ce qu'on lui demande. Si la première dépasse la seconde, aucun réglage n'y changera rien.
NIST/SEMATECH e-Handbook of Statistical Methods, §6.1.6 — What is Process Capability?
- 1The grey line under the explanation — that is the source. It appears on every question, without having to ask.
- 2Open it. This one points to the NIST/SEMATECH e-Handbook, freely available: go and read the cited chapter and judge whether the answer holds. Paid references are not linked, but their citation is complete and you can find them.
- 3The flag, on the right — if you find a mistake, one click is enough. No account. The report lands in my queue.
Go ahead, catch me out
The Discovery track is free and needs no account. Answer fifteen questions, read the sources shown under each correction, and if one of them looks wrong, report it in one click — the report lands in my queue, and I reply.
Standards and technical references
The citation covers the document as a whole: it names the reference that is authoritative on the subject, not a specific paragraph.
NIST/SEMATECH e-Handbook of Statistical Methods, §6.1.6 — What is Process Capability?
65 questionsview the source
NIST/SEMATECH e-Handbook of Statistical Methods, ch. 1 — Exploratory Data Analysis
100 questionsview the source
NIST/SEMATECH e-Handbook of Statistical Methods, ch. 2 — Measurement Process Characterization
66 questionsview the source
NIST/SEMATECH e-Handbook of Statistical Methods, ch. 4 — Process Modeling
66 questionsview the source
NIST/SEMATECH e-Handbook of Statistical Methods, ch. 5 — Process Improvement
68 questionsview the source
NIST/SEMATECH e-Handbook of Statistical Methods, ch. 6 — Process Monitoring and Control
75 questionsview the source
NIST/SEMATECH e-Handbook of Statistical Methods, ch. 7 — Product and Process Comparisons
78 questionsview the source
Who publishes beltup, what it promises and what it does not: about.