WGU D469 BUS 3890 Quality, Continuous Improvement, Lean Six Sigma OA PRE-TEST GUIDE 2025/2026

1. Multiple Choice: Which of the following is a core principle of
Lean Six Sigma?
 A) Reducing process variation
 B) Increasing process complexity
 C) Maximizing resource utilization
 D) Expanding product offerings
 Correct Answer: A) Reducing process variation
 Rationale: Lean Six Sigma focuses on eliminating waste and
reducing variation in processes to improve quality and efficiency.
2. Fill-in-the-Blank: The ________ is a graphical tool used in Six
Sigma to identify potential causes of a problem.
 Correct Answer: Fishbone Diagram
 Rationale: The Fishbone Diagram, also known as the Ishikawa or
cause-and-effect diagram, helps in brainstorming to identify
possible causes of a problem and sort ideas into useful categories.
3. True/False: Continuous improvement in Lean Six Sigma is only
focused on manufacturing processes.
 Correct Answer: False