Six Sigma Green Belt Certification Practice Exam

Which quality pioneer created statistical process control charts?

1. a. Genichi Taguchi

2. b. Kaoru Ishikawa

3. c. Joseph M. Juran

4. d. Walter A Shewhart

The correct answer is: d. Walter A Shewhart

The creation of statistical process control charts is attributed to Walter A. Shewhart, who is recognized as a key pioneer in the field of quality control and statistics. In the 1920s, Shewhart developed these charts as a means to monitor process variability and improve quality in manufacturing. His work laid the foundation for control charts, which help organizations to understand variations in their processes and to discern whether these variations are due to common causes or special causes. Control charts provide a visual representation of process performance over time, enabling teams to make informed decisions regarding process changes and improvements. Shewhart’s concepts of variation and control are crucial in the Six Sigma methodology, as they guide practitioners in reducing defects and improving process efficiency. The other figures mentioned have significantly contributed to quality management, but none developed the statistical process control charts specifically. Genichi Taguchi is known for his work on robust design and loss functions, Kaoru Ishikawa is noted for his contributions to quality management tools and the development of the Fishbone diagram, and Joseph M. Juran is recognized for his quality management principles and the Juran Trilogy, which focuses on quality planning, control, and improvement.