THE AUTHORS

GERALD J. LANGLEY is a statistician, author, and consultant, and co-founder of Associates in Process Improvement (API), consulting firm that specializes in the improvement of quality and productivity.

RONALD D. MOEN is a statistician, consultant, and teacher to industry, government, and education. He is co-founder of API.

KEVIN M. NOLAN is a statistician, author, and consultant at API, where he focuses on developing methods and assisting organizations to accelerate their rate of improvement in quality and productivity.

DR. THOMAS W. NOLAN is a statistician, author, and consultant, and co-founder of API.

CLIFFORD L. NORMAN is a consultant with API whose work has emphasized the psychology of change.

LLOYD P. PROVOST is a statistician who advises to organizations as an API associate.