IASSC Certified Lean Six Sigma Green Belt (ICGB) — Question 27

Fractional Factorial designs for an experimental approach are used when ____________ about the multiple metric interaction in a process.

Answer options

• A. Much is known
• B. Little is known
• C. We don’t care
• D. Data exists

Correct answer: B

Explanation

The correct answer is B, as Fractional Factorial designs are particularly useful when there is limited knowledge about the interactions between multiple metrics. Options A and D imply a level of understanding or data availability that contradicts the need for a fractional approach, while option C suggests a disregard for the interactions, which is not the purpose of using such designs.