FREE Certified Six Sigma Black Belt Control Phase: Process Monitoring Questions and Answers

Question 1

Which of the following is the primary objective of process monitoring in the Control Phase of a Six Sigma project?

Accepted Answer

To ensure that the implemented solutions maintain the gains achieved and prevent process degradation.

Answer

To identify new improvement opportunities for future projects.

Answer

To gather data for calculating the financial benefits of the project.

Answer

To train new employees on the revised process steps.

Question 2

A Six Sigma Black Belt has successfully implemented a new process that significantly reduced product defects. To ensure these gains are held, the Black Belt sets up control charts to track key process parameters. What type of variation is the Black Belt primarily looking to detect with these control charts?

Accepted Answer

Special cause variation indicating process instability.

Answer

Common cause variation within the new process.

Answer

Measurement system variation impacting data accuracy.

Answer

Design variation introduced during the Improve Phase.

Question 3

Which of the following tools is MOST appropriate for establishing process capability baselines and tracking performance against specifications in the Control Phase?

Accepted Answer

Process Capability Analysis (e.g., Cp, Cpk)

Answer

Pareto Chart

Answer

Cause and Effect Diagram

Answer

Failure Mode and Effects Analysis (FMEA)

Question 4

During the Control Phase, a process owner observes that a key process output, which had been stable after a Six Sigma project, now shows several data points outside the upper control limit on its X-bar chart. What immediate action should the process owner take?

Accepted Answer

Investigate the specific causes for the out-of-control points and take corrective action.

Answer

Recalculate the control limits to accommodate the new data points.

Answer

Stop the process immediately to prevent further defects.

Answer

Assume it's random variation and continue monitoring without intervention.

Question 5

A Black Belt is developing a Control Plan for a critical process. Which of the following elements is LEAST likely to be included in a comprehensive Control Plan?

Accepted Answer

Process flow diagram of the 'as-is' state.

Answer

Response plan for out-of-control conditions.

Answer

Measurement methods and sampling plans.

Answer

Roles and responsibilities for monitoring and control activities.

Question 6

What is the primary purpose of a 'response plan' within a Control Plan?

Accepted Answer

To outline the steps to take when a process goes out of control or deviates from target.

Answer

To document the financial savings achieved by the project.

Answer

To train new employees on the process operation.

Answer

To identify potential risks before they occur.