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100+ Free APMG LSS Green Belt Practice Questions

Pass your APMG International Lean Six Sigma Green Belt — Theory Exam (LSSA-aligned) exam on the first try — instant access, no signup required.

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A team wants to reduce the changeover time on a press from 4 hours to under 30 minutes. Which Lean technique is specifically designed to achieve rapid changeover?

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Key Facts: APMG LSS Green Belt Exam

40

multiple-choice questions on the APMG LSS Green Belt theory exam

APMG International exam specification, version 3.2

120 minutes

exam duration; open-book with up to 2 reference books permitted

APMG International and LSSA certification pages

63%

pass mark (25 out of 40 correct answers required)

LSSA Green Belt certification page (lssa.eu)

3 years

maximum time to submit the practical improvement project after passing the theory exam

LSSA Green Belt certification requirements

CIMM Level IV

maturity level required for the Green Belt practical project (statistically capable processes)

LSSA Continuous Improvement Maturity Model (CIMM)

APMG LSS Green Belt theory exam: 40 open-book MCQ questions, 120 minutes, 63% pass mark (25/40). Syllabus covers DMAIC in full — Define (charter, SIPOC, CTQ, Kano), Measure (Gage R&R, capability, DPMO, sigma level), Analyze (fishbone, 5 Whys, Pareto, hypothesis testing, regression), Improve (VSM, 5S, SMED, kanban, FMEA), and Control (SPC charts, control plans, change management). Aligned to LSSA Skill Set v3.2 and CIMM Levels III–IV.

Sample APMG LSS Green Belt Practice Questions

Try these sample questions to test your APMG LSS Green Belt exam readiness. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1A project team is using the DMAIC roadmap. In which phase should the team establish a baseline measurement of current process performance before attempting any changes?
A.Measure
B.Define
C.Analyze
D.Improve
Explanation: The Measure phase establishes baseline process performance using quantitative data before any improvement actions are taken. Without a reliable baseline, the team cannot determine whether a root cause has been identified correctly or whether an improvement has actually worked.
2A process improvement team wants to translate a broad customer need — 'faster delivery' — into a measurable performance requirement. Which tool is most appropriate for this translation?
A.CTQ tree
B.SIPOC diagram
C.Pareto chart
D.Control plan
Explanation: A CTQ (Critical to Quality) tree breaks a high-level customer need into driver requirements and then into specific, measurable quality characteristics. It bridges the gap between Voice of the Customer and the operational metrics the team will track.
3A project charter for a Lean Six Sigma improvement project should include which of the following elements?
A.Problem statement, scope, goals, team members, and timeline
B.Detailed root cause analysis and confirmed solution
C.Final control plan and updated standard operating procedures
D.Full statistical analysis results and hypothesis test outputs
Explanation: A project charter is a Define-phase document that formally initiates the project. It must include a clear problem statement, scope boundaries, measurable goals (often in sigma terms or DPMO), the team, the sponsor, and a high-level timeline. Root causes and solutions are not yet known at charter stage.
4During Define, a team creates a SIPOC diagram. What does the letter 'S' represent in SIPOC?
A.Suppliers
B.Stakeholders
C.Standards
D.Scope
Explanation: SIPOC stands for Suppliers, Inputs, Process, Outputs, Customers. The Suppliers element identifies who or what provides the inputs to the process. It gives the team a high-level view of the end-to-end process before mapping it in detail.
5A Kano model analysis separates customer requirements into categories. Which Kano category describes features that customers expect as a minimum and whose absence causes dissatisfaction, but whose presence does not increase satisfaction?
A.Performance (one-dimensional) requirements
B.Excitement (delighter) requirements
C.Must-be (threshold) requirements
D.Indifferent requirements
Explanation: Must-be (threshold) requirements are basic expectations customers take for granted. If they are absent, customers are dissatisfied; if present, satisfaction does not increase. An example is a hotel room having running water — guests expect it but are not delighted by it.
6A team selects projects using a criteria matrix. Which financial metric represents the annualized dollar value of expected savings or revenue gain from an improvement project?
A.Net Present Value (NPV)
B.Payback period
C.Cost of Poor Quality (COPQ)
D.Return on Investment (ROI)
Explanation: Return on Investment (ROI) expresses the benefit of a project relative to its cost as a percentage. It is widely used in project selection matrices to compare improvement opportunities on a common financial basis and prioritise those with the highest expected return.
7An operational definition specifies how a measurement will be made in a way that ensures consistency. Which characteristic is most important for an operational definition to have?
A.It must be unambiguous so any trained person produces the same result.
B.It must include the target specification limits.
C.It must be approved by senior management before use.
D.It must be written in statistical notation.
Explanation: An operational definition must eliminate ambiguity so that different operators measuring the same characteristic produce the same result. Without this, measurement variation obscures true process variation and makes data unreliable for decision-making.
8A team plans a data collection effort. They decide to measure every 10th unit produced rather than every unit. What type of sampling are they using?
A.Systematic sampling
B.Stratified sampling
C.Cluster sampling
D.Convenience sampling
Explanation: Systematic sampling selects every nth unit from a population at a regular interval. It is practical, easy to implement, and provides reasonable coverage over time when the production sequence is not cyclical in a way that would bias the sample.
9In a Gage R&R study, the variation attributed to the measurement system itself is found to be 38% of total observed variation. How should the team interpret this result?
A.The measurement system is acceptable for use with minimal concern.
B.The measurement system may be used but should be improved as time allows.
C.The measurement system is unacceptable and must be improved before valid process data can be collected.
D.The measurement system variation is irrelevant provided specification limits are wide enough.
Explanation: LSSA/AIAG guidelines classify a measurement system as unacceptable when the %Gauge R&R exceeds 30% of total variation. At 38%, the measurement system is contributing too much variation to draw reliable conclusions about the process. It must be improved — by addressing reproducibility (operator) and repeatability (equipment) sources — before process data can be trusted.
10A process produces a product with USL = 50 mm and LSL = 40 mm. The process mean is 45 mm and standard deviation is 1.2 mm. What is the Cp value?
A.1.39
B.0.69
C.2.78
D.4.17
Explanation: Cp = (USL − LSL) / (6σ) = (50 − 40) / (6 × 1.2) = 10 / 7.2 = 1.39. Cp measures the potential capability of the process (assuming it were centred) by comparing the specification width to the process spread (6 sigma). A Cp of 1.39 indicates the process has adequate spread capability.

About the APMG LSS Green Belt Exam

The APMG International Lean Six Sigma Green Belt theory exam is based on the Lean Six Sigma Academy (LSSA) Skill Set v3.2 and tests DMAIC knowledge at CIMM Level III–IV depth. The theory exam consists of 40 open-book multiple-choice questions in 120 minutes with a 63% pass mark (25/40). Achieving the full Green Belt certificate additionally requires a successful improvement project demonstrating CIMM Level-IV competencies, submitted within 3 years of passing the theory exam.

Assessment

40 compulsory multiple-choice questions; candidates select one answer from four options; open-book format (up to 2 reference books permitted; exercise books not allowed)

Time Limit

120 minutes

Passing Score

25 out of 40 correct answers (63%)

Exam Fee

GBP 470 for the APMG public theory exam (version 3.2); fees vary by region and provider (APMG International (accreditor); Lean Six Sigma Academy (LSSA) (syllabus owner))

APMG LSS Green Belt Exam Content Outline

~15%

Define Phase

Project charter, problem statement, scope, SIPOC, Voice of the Customer, CTQ tree, Kano model, project selection (COPQ, ROI), and stakeholder analysis.

~25%

Measure Phase

Data collection plans, operational definitions, sampling, measurement system analysis (Gage R&R — repeatability and reproducibility), descriptive statistics, normal distribution, DPMO, sigma level, process capability (Cp, Cpk, Pp, Ppk), Rolled Throughput Yield, and process mapping.

~25%

Analyze Phase

Fishbone (Ishikawa) diagrams, 5 Whys, Pareto charts, stratification, scatter diagrams, correlation, linear regression, hypothesis testing (two-sample t-test, ANOVA, chi-square), p-values, Type I/II errors, multi-vari charts, and root cause confirmation.

~20%

Improve Phase

Value stream mapping (current and future state), seven Lean wastes (Muda-Mura-Muri), 5S, SMED, kanban and pull systems, poka-yoke, takt time, one-piece flow, TPM and OEE, FMEA (RPN calculation), pilot testing, and solution selection matrix.

~15%

Control Phase

Control chart selection and interpretation (Xbar-R, Xbar-S, I-MR, p, np, c, u charts), SPC rules (run tests, special cause signals), control plans, updated SOPs, change management, process handover, lessons learned, and project closure.

How to Pass the APMG LSS Green Belt Exam

What You Need to Know

  • Passing score: 25 out of 40 correct answers (63%)
  • Assessment: 40 compulsory multiple-choice questions; candidates select one answer from four options; open-book format (up to 2 reference books permitted; exercise books not allowed)
  • Time limit: 120 minutes
  • Exam fee: GBP 470 for the APMG public theory exam (version 3.2); fees vary by region and provider

Keys to Passing

  • Complete 500+ practice questions
  • Score 80%+ consistently before scheduling
  • Focus on highest-weighted sections
  • Use our AI tutor for tough concepts

APMG LSS Green Belt Study Tips from Top Performers

1Master the DMAIC sequence and know what decisions and tools belong in each phase — the exam tests phase-gate thinking as well as individual tools.
2Practise Cp, Cpk, Pp, Ppk, and DPMO calculations by hand; the open-book format allows you to use formulae but you must know when to apply them and how to interpret the result.
3Understand the Gage R&R acceptability thresholds: below 10% is acceptable, 10–30% is marginal, above 30% is unacceptable — and know that Severity ≥ 9 in FMEA requires action regardless of RPN.
4For control charts, memorise which chart type matches each data type (Xbar-R for continuous subgroups; I-MR for n=1; p/np for proportions; c/u for defect counts) and at least two SPC run rules beyond points outside the control limits.
5Study change management alongside the technical tools — the exam includes questions on why improvements fail, how to engage resistant stakeholders, and what it means to formally hand over a process to its owner.

Frequently Asked Questions

How many questions are on the APMG Lean Six Sigma Green Belt theory exam?

The APMG Lean Six Sigma Green Belt theory exam (version 3.2) consists of 40 multiple-choice questions. Each question has four options and candidates select one answer. The exam duration is 120 minutes.

What is the pass mark for the APMG Lean Six Sigma Green Belt theory exam?

Candidates must answer at least 25 out of 40 questions correctly to pass, which is a 63% pass mark. APMG and LSSA do not publish an official pass-rate percentage.

Is the APMG Lean Six Sigma Green Belt theory exam open book?

Yes, the exam is open book. Candidates may bring up to 2 reference books into the exam. Exercise books and handwritten notes are not permitted. Calculators and statistical software such as Minitab are also allowed.

What is the difference between the APMG/LSSA Green Belt and the IASSC Green Belt?

The APMG/LSSA Green Belt uses the LSSA Skill Set and CIMM maturity framework, with a 40-question open-book theory exam at 63% pass mark. The IASSC Lean Six Sigma Green Belt uses a separate body of knowledge with a 100-question closed-book exam at 70% pass mark. Content overlaps significantly but terminology, structure, and exam format differ.

Do I need to complete a project to earn the APMG/LSSA Green Belt certificate?

The theory exam alone earns a 'Lean Six Sigma Green Belt Theory Exam' digital badge from APMG. The full Green Belt certificate requires passing the theory exam AND submitting a successful DMAIC or DMADV improvement project demonstrating CIMM Level-IV competencies. The practical project must be submitted within 3 years of passing the theory exam.

What topics does the APMG Lean Six Sigma Green Belt theory exam cover?

The exam covers the full DMAIC cycle at Green Belt depth: Define (SIPOC, CTQ tree, project charter, Kano model), Measure (Gage R&R, process capability Cp/Cpk/Pp/Ppk, DPMO, sigma level), Analyze (hypothesis testing, regression, fishbone, Pareto), Improve (VSM, 5S, SMED, kanban, FMEA), and Control (SPC control charts, control plans, change management).