Lean Six Sigma Yellow Belt The Control Phase Questions and Answers

Question 1

What is the primary purpose of the Control Phase in a DMAIC project?

Accepted Answer

To sustain the gains achieved and ensure the process does not revert to its old state.

Answer

To identify the vital few root causes of a problem.

Answer

To brainstorm and implement potential solutions for the process.

Answer

To define the project scope and create a high-level map of the process.

Question 2

A team has successfully reduced defects in a production line. To monitor the process going forward, they plot the number of defects per week on a chart with a center line and statistically determined upper and lower limits. What is this tool called?

Accepted Answer

Control Chart

Answer

Pareto Chart

Answer

Fishbone Diagram

Answer

Scatter Plot

Question 3

Which of the following is a key deliverable created during the Control Phase that documents how to maintain the improved process performance?

Accepted Answer

A Control Plan detailing monitoring actions and response procedures.

Answer

A Project Charter outlining the business case.

Answer

A detailed analysis of root causes.

Answer

A list of potential solutions from a brainstorming session.

Question 4

On a control chart used to monitor a process, a single data point is observed to be above the Upper Control Limit (UCL). What does this signify?

Accepted Answer

The presence of special cause variation.

Answer

The process is stable and performing as expected.

Answer

The process is only exhibiting common cause variation.

Answer

The project has successfully concluded.

Question 5

A project team has implemented a new, more efficient method for processing invoices. To ensure all employees use the new method consistently, they update the official work instructions and conduct training sessions. This activity is a crucial part of which Control Phase element?

Accepted Answer

Standardizing the process

Answer

Calculating the final ROI

Answer

Creating a Fishbone Diagram

Answer

Performing hypothesis testing

Question 6

What is the final step in the Control Phase, which formally signifies the end of the DMAIC project?

Accepted Answer

Handing over the process ownership to the process owner.

Answer

Implementing the chosen solution.

Answer

Identifying the root cause of the problem.

Answer

Measuring the baseline performance of the process.