Knowledge Flashcards
7 cards from real Lean Six Sigma Green 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 Knowledge flashcards as text
In the DMAIC methodology, which phase focuses on identifying and validating the root causes of defects?
Answer: Analyze
The Analyze phase uses tools like fishbone diagrams and hypothesis testing to identify and confirm root causes.
What does a Cp value of 1.33 indicate about a process?
Answer: The process is capable with some margin
A Cp of 1.33 means the process spread fits within specification limits with adequate margin, meeting the minimum industry standard for capable processes.
Which type of data is best represented by a p-chart in statistical process control?
Answer: Proportion of defective units
A p-chart tracks the proportion (fraction) of defective items in subgroups of varying or constant size.
A Lean Six Sigma team discovers a process step that adds cost but no customer value. This step is classified as:
Answer: Non-value-added
Any step that adds cost without transforming the product in a way the customer values is non-value-added waste and should be eliminated.
What is the primary purpose of a SIPOC diagram?
Answer: To provide a high-level view of the process scope and key elements
A SIPOC (Suppliers, Inputs, Process, Outputs, Customers) diagram gives a concise high-level overview used early in the Define phase to scope the project.
In hypothesis testing, a Type II error occurs when:
Answer: A false null hypothesis is not rejected
A Type II error (beta error) is failing to reject a null hypothesis that is actually false — missing a real effect.
Which Lean concept describes producing only what is needed, when it is needed, and in the amount needed?
Answer: Just-In-Time (JIT)
Just-In-Time is a Lean pillar that eliminates overproduction by synchronizing production flow with actual demand.