Who coined the term "black belts" for statistically trained problem-solving experts?

The term "black belts" for statistically trained problem-solving experts was coined by Bill Smith, who is recognized for his significant contributions to the Six Sigma methodology while working at Motorola in the 1980s. Smith introduced the black belt terminology to designate a level of expertise in quality management, signifying individuals who have undergone rigorous training in statistical analysis and problem-solving techniques associated with Six Sigma. This designation helped to create a structured hierarchy of skill levels within the organization, enabling a clear understanding of the capabilities and responsibilities of individuals involved in Six Sigma initiatives.

Understanding the origins of the term not only highlights its importance in the Six Sigma framework but also reflects the evolution of quality management practices that integrate statistical tools to enhance process improvement and organizational efficiency.