Lean Six Sigma Green Belt Certification Lean Six Sigma Green Belt Improve Phase and Solutions 1

Question 1

In the Improve phase, a Force Field Analysis is used primarily to:

Accepted Answer

Identify and balance the driving forces and restraining forces surrounding a proposed change

Answer

Force Field Analysis, developed by Kurt Lewin, visually separates the forces pushing toward a change (drivers) from those pushing against it (restrainers), helping the team plan how to amplify drivers and weaken barriers before implementation.

Question 2

Poka-Yoke devices are incorporated during the Improve phase primarily to:

Accepted Answer

Prevent errors from occurring or detect them immediately before they become defects

Answer

Poka-Yoke (mistake-proofing) mechanisms are designed either to make errors physically impossible (prevention) or to signal an error the instant it occurs (detection), eliminating defects at the source rather than catching them downstream.

Question 3

A full factorial designed experiment differs from a fractional factorial design in that it:

Accepted Answer

Tests every possible combination of factor levels, estimating all main effects and all interactions

Answer

A full factorial design runs all possible combinations of the chosen factor levels, providing complete information on every main effect and every interaction, but at the cost of more experimental runs compared to fractional alternatives.

Question 4

When a Green Belt calculates the length of time required for cumulative project savings to equal the initial implementation cost, they are computing the:

Accepted Answer

Payback period

Answer

The payback period measures how long it takes for the accumulated financial benefits of an improvement to recover its upfront cost, and is a common, easy-to-communicate financial justification metric in Lean Six Sigma projects.

Question 5

A Kaizen event conducted during the Improve phase is best characterized as:

Accepted Answer

A focused, short-duration team effort (typically three to five days) to rapidly implement targeted process improvements

Answer

Kaizen events (also called Kaizen blitzes or rapid improvement workshops) concentrate a cross-functional team on a specific process area for a brief, intensive period to design and implement improvements immediately, compressing months of change into days.

Lean Six Sigma Green Belt Certification Practice Test

Lean Six Sigma Green Belt Certification Practice Test

Lean Six Sigma Green Belt Certification Lean Six Sigma Green Belt Improve Phase and Solutions 1