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

Map all process inputs to their corresponding outputs

Answer

Calculate the return on investment for competing solutions

Answer

Determine the optimal factor settings through experimentation

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

Measure process capability after a solution is deployed

Answer

Weight and rank competing improvement solutions

Answer

Identify which input variables most strongly influence process output

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

Tests only the factor combinations most likely to affect the response

Answer

Requires fewer experimental runs by omitting higher-order interactions

Answer

Focuses exclusively on optimizing a single critical input variable

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

Net present value (NPV)

Answer

Internal rate of return (IRR)

Answer

Return on investment (ROI) percentage

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

A multi-month statistical study to identify optimal process parameters

Answer

A structured root-cause analysis session led by the process owner

Answer

A tollgate review where the project sponsor approves the solution before piloting

Question 6

In a designed experiment, an interaction effect between two factors (A and B) indicates that:

Accepted Answer

The effect of factor A on the response variable changes depending on the level at which factor B is set

Answer

Both factors individually have a statistically insignificant effect on the response

Answer

Factors A and B must remain at fixed levels for the experiment to produce valid results

Answer

Adjusting factor A automatically and physically changes the setting of factor B

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

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