Prep Flashcards
7 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 7 Prep flashcards as text
Which tool is MOST appropriate for prioritizing which problems to solve when resources are limited?
Answer: Pareto chart applying the 80/20 rule
A Pareto chart identifies the 'vital few' causes responsible for the majority of defects, enabling teams to focus limited resources for maximum impact.
A process with Cpk = 0.5 indicates:
Answer: The process is not capable and produces many defects outside specification limits
Cpk < 1.0 means the process is not capable; Cpk = 0.5 indicates the process is significantly off-center or too variable relative to specifications.
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.
A run chart shows 8 consecutive data points all above the process mean. This is an example of:
Answer: A signal of special cause variation requiring investigation
The 'rule of eight' states that 8 or more consecutive points on one side of the center line signal a non-random pattern indicating special cause variation.
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.
Which of the following is an example of 'value-added' work in a Lean process?
Answer: Machining a part to the customer's required specification
Value-added work transforms the product in a way the customer wants and is willing to pay for; inspection, waiting, and transport are non-value-added wastes.
A Yellow Belt team wants to test whether a process change actually improved output quality before full implementation. The BEST approach is to:
Answer: Run a small-scale pilot experiment and compare results to the baseline using data
Piloting the change on a small scale and using data to compare against the baseline is the evidence-based Six Sigma approach to validating improvements before full rollout.