IASSC Lean Six Sigma Black Belt Study
Guide UPDATED Exam Questions and
CORRECT Answers
Six Sigma - CORRECT ANSWER - A disciplined, data-driven methodology to improve
processes by minimizing variation and defects, targeting a maximum of 3.4 Defects Per Million
Opportunities (DPMO) at a 6σ level.
Continuous Improvement - CORRECT ANSWER - A philosophy of ongoing process
enhancement through incremental changes and breakthrough improvements.
Deliverables of a Lean Six Sigma Project - CORRECT ANSWER - Key outputs include a
project charter, process maps, Critical to Quality (CTQ) metrics, data collection plans,
improvement strategies, control plans, and documented financial benefits.
Problem Solving Strategy Y = f(x) - CORRECT ANSWER - Represents the process
output (Y) as a function of inputs (x), identifying critical x's that influence Y to optimize
outcomes.
Voice of the Customer (VOC) - CORRECT ANSWER - Captures customer needs,
expectations, and pain points through methods like surveys, interviews, or focus groups,
translated into measurable CTQs.
Voice of the Business (VOB) - CORRECT ANSWER - Reflects organizational priorities,
such as cost reduction, revenue growth, or regulatory compliance, ensuring projects align with
strategic goals.
Voice of the Employee (VOE) - CORRECT ANSWER - Incorporates employee insights
on process inefficiencies, morale, or resource needs to enhance engagement and process design.
Champion - CORRECT ANSWER - Senior leader who sponsors projects, secures
resources, and removes barriers.
, Black Belt - CORRECT ANSWER - Full-time leader of complex projects, mentors Green
Belts, and uses advanced statistical tools.
Green Belt - CORRECT ANSWER - Part-time project supporter who applies Six Sigma
tools under Black Belt guidance.
Yellow Belt - CORRECT ANSWER - Entry-level team member with basic training who
assists in projects.
Master Black Belt - CORRECT ANSWER - Expert who trains/coaches Black and Green
Belts and oversees program strategy.
Defects Per Million Opportunities (DPMO) - CORRECT ANSWER - A metric used in Six
Sigma to quantify the number of defects in a process, aiming for a maximum of 3.4 DPMO at a
6σ level.
Critical to Quality (CTQ) - CORRECT ANSWER - Measurable characteristics that are
vital to customer satisfaction and are derived from the Voice of the Customer.
Plan-Do-Check-Act (PDCA) - CORRECT ANSWER - A framework used in continuous
improvement that involves planning a change, implementing it, checking the results, and acting
on what is learned.
Define-Measure-Analyze-Improve-Control (DMAIC) - CORRECT ANSWER - A data-
driven quality strategy used to improve processes, consisting of five phases: Define, Measure,
Analyze, Improve, and Control.
Statistical Process Control (SPC) - CORRECT ANSWER - A method of quality control
that uses statistical methods to monitor and control a process.
Guide UPDATED Exam Questions and
CORRECT Answers
Six Sigma - CORRECT ANSWER - A disciplined, data-driven methodology to improve
processes by minimizing variation and defects, targeting a maximum of 3.4 Defects Per Million
Opportunities (DPMO) at a 6σ level.
Continuous Improvement - CORRECT ANSWER - A philosophy of ongoing process
enhancement through incremental changes and breakthrough improvements.
Deliverables of a Lean Six Sigma Project - CORRECT ANSWER - Key outputs include a
project charter, process maps, Critical to Quality (CTQ) metrics, data collection plans,
improvement strategies, control plans, and documented financial benefits.
Problem Solving Strategy Y = f(x) - CORRECT ANSWER - Represents the process
output (Y) as a function of inputs (x), identifying critical x's that influence Y to optimize
outcomes.
Voice of the Customer (VOC) - CORRECT ANSWER - Captures customer needs,
expectations, and pain points through methods like surveys, interviews, or focus groups,
translated into measurable CTQs.
Voice of the Business (VOB) - CORRECT ANSWER - Reflects organizational priorities,
such as cost reduction, revenue growth, or regulatory compliance, ensuring projects align with
strategic goals.
Voice of the Employee (VOE) - CORRECT ANSWER - Incorporates employee insights
on process inefficiencies, morale, or resource needs to enhance engagement and process design.
Champion - CORRECT ANSWER - Senior leader who sponsors projects, secures
resources, and removes barriers.
, Black Belt - CORRECT ANSWER - Full-time leader of complex projects, mentors Green
Belts, and uses advanced statistical tools.
Green Belt - CORRECT ANSWER - Part-time project supporter who applies Six Sigma
tools under Black Belt guidance.
Yellow Belt - CORRECT ANSWER - Entry-level team member with basic training who
assists in projects.
Master Black Belt - CORRECT ANSWER - Expert who trains/coaches Black and Green
Belts and oversees program strategy.
Defects Per Million Opportunities (DPMO) - CORRECT ANSWER - A metric used in Six
Sigma to quantify the number of defects in a process, aiming for a maximum of 3.4 DPMO at a
6σ level.
Critical to Quality (CTQ) - CORRECT ANSWER - Measurable characteristics that are
vital to customer satisfaction and are derived from the Voice of the Customer.
Plan-Do-Check-Act (PDCA) - CORRECT ANSWER - A framework used in continuous
improvement that involves planning a change, implementing it, checking the results, and acting
on what is learned.
Define-Measure-Analyze-Improve-Control (DMAIC) - CORRECT ANSWER - A data-
driven quality strategy used to improve processes, consisting of five phases: Define, Measure,
Analyze, Improve, and Control.
Statistical Process Control (SPC) - CORRECT ANSWER - A method of quality control
that uses statistical methods to monitor and control a process.
