American Society for Quality Certification Practice Test 2025 - Free Practice Questions and Study Guide.

Walter Shewhart is widely recognized for developing the concept of Statistical Process Control (SPC), which is a powerful method used to monitor and control manufacturing processes to ensure that they operate at their full potential. SPC involves the use of statistical methods to analyze data from production processes, identify variations, and minimize them to produce high-quality products consistently.

Shewhart's foundational work laid the groundwork for modern quality management practices. He introduced the control chart, a graphical tool used to determine whether a manufacturing or business process is in a state of control. The ability to detect variations allows organizations to identify issues before they lead to defects, thereby promoting a proactive approach to quality assurance rather than a reactive one.

While options such as Quality Control System, Continuous Improvement Model, and Lean Management System are related to quality management and efficiency, they are not specifically attributed to Shewhart's contributions. Instead, they represent broader concepts or methodologies developed and popularized later in the context of quality assurance and management practices. Thus, the specific focus on Shewhart brings us to the concept of Statistical Process Control as the most accurate answer.