HPT and Six Sigma: Is There a Difference That Matters?

This article explores the major differences and similarities between Six Sigma and human performance technology or human performance improvement (HPT or HPI). It addresses the definitions and foundations of both Six Sigma and HPT as major performance improvement approaches. It explains how their methodologies are similar in some aspects and different in others. It compares the popularity and applicability of the two approaches in both small and large companies. It discusses the psychological elements underlying each method. Moreover, it considers the criteria of success in managing HPT and Six Sigma projects. It also addresses the reasons for the similarities and differences between the two processes and suggests an integrated approach that focuses on both human and nonhuman improvement in an attempt to overcome the limitations of each approach.