Lean Six Sigma Green Belt Analyze Phase Tools Questions and Answers

Question 1

A Six Sigma team is analyzing customer complaints for a software application.
They create a chart that displays the complaint categories in descending order of frequency, and also shows the cumulative percentage.
This allows them to visually identify the few categories that account for the majority of the problems.
Which tool is the team using?

Accepted Answer

Pareto Chart

Answer

Control Chart

Answer

Scatter Plot

Answer

Fishbone Diagram

Question 2

A project team wants to understand the relationship between two continuous variables: advertising spend (X) and product sales (Y). They suspect that as advertising spend increases, sales also increase. Which statistical tool in the Analyze phase would be most appropriate to quantify the strength and direction of this relationship?

Accepted Answer

Regression Analysis

Answer

Analysis of Variance (ANOVA)

Answer

Chi-Square Test

Answer

5 Whys

Question 3

In the Analyze phase, a team is using Failure Mode and Effects Analysis (FMEA) to proactively identify and address potential problems in a new process. They have identified a potential failure mode and rated its Severity as 8, its Occurrence as 3, and its Detection as 6. What is the Risk Priority Number (RPN) for this failure mode?

Accepted Answer

144

Answer

17

Answer

24

Answer

48

Question 4

A Green Belt is leading a team to find the fundamental cause of a recurring machine breakdown. The initial problem is 'The conveyor belt stopped'. The team proceeds by asking 'Why did it stop?', then 'Why did that happen?', and so on, to drill down to the most basic cause. Which root cause analysis tool are they employing?

Accepted Answer

5 Whys

Answer

Brainstorming

Answer

Affinity Diagram

Answer

Hypothesis Testing

Question 5

Which of the following activities is a primary goal of the Analyze phase in a DMAIC project?

Accepted Answer

To use data and statistical methods to verify the root causes of a problem.

Answer

To implement and pilot the proposed solution.

Answer

To develop a detailed data collection plan.

Answer

To create a control plan to sustain the gains from the project.

Question 6

A team is investigating if there is a statistically significant difference in the average call handling time between two different call centers. They have collected sample data from both centers. To formally test the assumption that the means are different, what statistical method should they use?

Accepted Answer

Hypothesis Testing (e.g., t-test)

Answer

Process Capability Analysis (Cp/Cpk)

Answer

Gage R&R Study

Answer

Failure Mode and Effects Analysis (FMEA)