Mixed Deck — All Lean Six Sigma Yellow Belt Certification Topics Flashcards
100 cards from real Lean Six Sigma Yellow Belt Certification practice questions. Tap to flip, then mark Knew It or Still Learning — missed cards come back until you master them.
Read the first 20 Mixed Deck — All Lean Six Sigma Yellow Belt Certification Topics flashcards as text
In the 5S methodology, what does the second 'S' (Seiton) mean?
Answer: Set in order — arrange tools and materials for efficient access
Seiton (Set in Order) means organizing remaining items so everything has a designated place, reducing search time and enabling visual management.
What does a well-written goal statement in a Define phase project charter typically follow?
Answer: SMART criteria (Specific, Measurable, Achievable, Relevant, Time-bound)
SMART criteria ensure the goal statement is clear, trackable, realistic, aligned with business needs, and has a deadline. Without these qualities, a goal statement cannot be objectively evaluated at the project tollgate.
What is a process map primarily used for in a Lean Six Sigma project?
Answer: Visualizing the sequence of steps in a process
A process map visually documents the flow of steps, decisions, and handoffs within a process to help teams understand and improve it.
In the DMAIC methodology, during which phase is Root Cause Analysis primarily performed?
Answer: Analyze
Root Cause Analysis belongs in the Analyze phase, where teams examine collected data and use tools like fishbone diagrams and 5 Whys to identify the fundamental causes of defects before moving to solutions.
In a Lean office environment, which of the following would be classified as a 'defect' waste?
Answer: An invoice sent with incorrect billing information requiring correction
An incorrect invoice is a defect in a service process — it requires rework, delays payment, and damages customer trust.
Voice of the Customer (VOC) data is most commonly gathered through:
Answer: Surveys, interviews, focus groups, and complaint data
VOC is collected directly from customers using surveys, interviews, focus groups, and complaint analysis to understand their needs.
What does a high Gauge R&R percentage (e.g., >30%) relative to total variation indicate?
Answer: The measurement system contributes too much variation and needs improvement
When Gauge R&R exceeds 30% of total variation, the measurement system is considered unacceptable and must be improved before data is reliable.
Which measurement scale has a true zero point and allows meaningful ratio comparisons?
Answer: Ratio
A ratio scale has a true zero point, meaning zero represents absence of the attribute, enabling meaningful ratios (e.g., 20 kg is twice 10 kg).
In the Analyze phase, what is the primary purpose of performing a hypothesis test?
Answer: To statistically validate whether a suspected cause has a significant effect on the output.
Hypothesis testing is a statistical method used to make decisions using data. In the Analyze phase, it is used to determine if there is enough evidence to conclude that a suspected root cause (an input variable 'X') has a statistically significant impact on the project's primary metric (the output 'Y').
Flow charts can be used to find areas where efficiency can be improved: False or true
Answer: True
Flowcharts are visual representations that illustrate the steps, decisions, and interactions within a process. They provide a clear and structured view of how a process works, allowing individuals to analyze the process and identify areas where inefficiencies or bottlenecks may exist.
A team discovers that 80% of defects come from 20% of the causes. Which principle does this represent?
Answer: Pareto Principle
The Pareto Principle (80/20 rule) states that roughly 80% of effects come from 20% of causes, helping teams prioritize root causes.
Which term describes variation in a process caused by identifiable, irregular factors?
Answer: Special cause variation
Special cause variation results from specific, assignable factors that are not part of the normal process operation and can be identified and removed.
A run chart is most useful for:
Answer: Detecting trends or shifts in process performance over time
Run charts plot data in time sequence, making them ideal for spotting trends, cycles, or shifts before applying control charts.
What is the primary goal of the Control phase in DMAIC?
Answer: Sustain the improvements and prevent regression
The Control phase establishes monitoring systems, control plans, and standardized procedures to ensure improvements are maintained over time.
In the Define phase, what is the main benefit of creating a business case for a Lean Six Sigma project?
Answer: It justifies the project by linking it to strategic goals and financial impact
The business case connects the project to organizational strategy and quantifies the expected financial or operational benefits to justify resource investment.
Process Control Systems can improve organizational competence and compliance by standardizing processes: False or true
Answer: True
Process Control Systems (PCS) are designed to monitor and regulate processes to ensure consistent output and adherence to established standards. By standardizing processes, PCS reduces variability, improves predictability, and ensures tasks are performed correctly and consistently. This directly enhances an organization's competence by making operations more reliable and improves compliance with internal policies and external regulations.
A check sheet is most useful in the Measure phase for:
Answer: Systematically collecting and tallying defect or event data in real time
A check sheet is a structured form for collecting and organizing data at the source, making tallying and pattern recognition easy.
In the DMAIC model, during which phase would a team create a Project Charter?
Answer: Define
The Project Charter is created in the Define phase to formally scope the problem, goals, team, and timeline.
What is the primary purpose of a Pareto Chart in Lean Six Sigma?
Answer: To identify the vital few causes responsible for the majority of problems
A Pareto Chart applies the 80/20 rule, helping teams focus on the few causes (typically 20%) that are responsible for the majority of defects or problems (typically 80%), so efforts are prioritized effectively.
What is the main goal of the Control phase in DMAIC?
Answer: To sustain the improvements achieved and prevent the process from reverting to old behavior
The Control phase institutionalizes improvements through control plans, standard operating procedures, and monitoring systems to sustain gains long-term.