Lean Six Sigma Yellow Belt The Analyze Phase Questions and Answers

Question 1

A project team is trying to understand the fundamental reason why a specific machine repeatedly malfunctions.
They begin by stating the problem and then sequentially ask the same question to drill down through layers of symptoms.
Which root cause analysis tool are they using?

Accepted Answer

5 Whys

Answer

Fishbone Diagram

Answer

Scatter Plot

Answer

Histogram

Question 2

In the Analyze phase, what is the primary purpose of performing a hypothesis test?

Accepted Answer

To statistically validate whether a suspected cause has a significant effect on the output.

Answer

To visually represent the frequency of different defects.

Answer

To brainstorm all possible causes of a process issue.

Answer

To create a high-level map of the process stakeholders.

Question 3

A team suspects that an increase in ambient factory temperature is related to a higher number of product defects. Which tool would be most effective for visually investigating the potential relationship between these two continuous variables?

Accepted Answer

Scatter Plot

Answer

Control Chart

Answer

Pareto Chart

Answer

Process Map

Question 4

Which of the following represents the key transition that occurs when a DMAIC project moves from the Measure phase to the Analyze phase?

Accepted Answer

From collecting baseline data and validating the measurement system to identifying and verifying root causes.

Answer

From brainstorming potential solutions to implementing them.

Answer

From defining the project scope to mapping the high-level process.

Answer

From implementing a control plan to closing out the project.

Question 5

A team analyzing a process map for an invoice payment system identifies a step where invoices sit in a queue for an average of three days waiting for approval. This waiting period consumes time but does not change the invoice or add value from the customer's perspective. How is this step best classified?

Accepted Answer

Non-Value-Added (Waste)

Answer

A bottleneck

Answer

Value-Added

Answer

A critical control point

Question 6

Which of the following graphical tools is most useful during the Analyze phase for understanding the shape, center, and spread of a set of continuous measurement data?

Accepted Answer

Histogram

Answer

Run Chart

Answer

SIPOC Diagram

Answer

Fishbone Diagram

A project team is trying to understand the fundamental reason why a specific machine repeatedly malfunctions.They begin by stating the problem and then sequentially ask the same question to drill down through layers of symptoms.Which root cause analysis tool are they using?

A project team is trying to understand the fundamental reason why a specific machine repeatedly malfunctions.
They begin by stating the problem and then sequentially ask the same question to drill down through layers of symptoms.
Which root cause analysis tool are they using?