Lean Six Sigma Green Belt Improve Phase and Solutions Questions and Answers

Question 1

After brainstorming several potential solutions to reduce invoicing errors, a project team needs to down-select the best option to implement. They create a grid where they score each solution against criteria such as 'Cost to Implement', 'Time to Implement', and 'Impact on Error Rate'. Which tool are they most likely using?

Accepted Answer

Solution Selection Matrix

Answer

A Solution Selection Matrix is a tool used in the Improve phase to evaluate multiple potential solutions against a set of weighted criteria. This allows the team to make a data-driven decision on which solution is the most viable and impactful.

Question 2

A project team is implementing a solution to prevent assemblers from installing a computer component backward. They design a new version of the component with an offset pin that only allows it to be inserted in the correct orientation. Which Lean technique does this solution exemplify?

Accepted Answer

Poka-Yoke

Answer

Poka-Yoke is a Japanese term that means 'mistake-proofing' or 'error-proofing'. The redesigned component, which physically prevents incorrect assembly, is a classic example of this technique.

Question 3

A team has developed a new software workflow intended to reduce data entry errors. Before rolling out the change to all 200 employees, they decide to implement it with a small group of 10 users for two weeks to gather data and feedback. What is the PRIMARY purpose of this activity?

Accepted Answer

To validate the solution and identify potential risks on a small scale.

Answer

This activity is a pilot test. The primary purpose of a pilot is to test a proposed solution in a controlled, real-world environment on a small scale before full implementation. This helps validate that the solution works as expected and uncovers any unforeseen problems or risks.

Question 4

A Green Belt is leading a short, focused, rapid improvement event with a cross-functional team to rearrange a workspace for better flow and efficiency. The event is expected to last 3-5 days and result in immediate changes. What is this type of event called?

Accepted Answer

A Kaizen event

Answer

A Kaizen event (also called a Kaizen blitz or rapid improvement event) is a highly focused, short-term (typically 3-5 days) activity involving a cross-functional team to make significant improvements in a specific area.

Question 5

In a Design of Experiments (DOE), a team is studying the effect of two factors—temperature and pressure—on product yield. They discover that the effect of temperature on yield is different at high pressure than it is at low pressure. What is this phenomenon called?

Accepted Answer

An interaction effect

Answer

An interaction effect occurs when the effect of one factor on the response variable depends on the level of another factor. In this case, the relationship between temperature and yield changes based on the pressure level, indicating an interaction between the two factors.

Lean Six Sigma Green Belt Certification Practice Test

Lean Six Sigma Green Belt Certification Practice Test

Lean Six Sigma Green Belt Improve Phase and Solutions Questions and Answers