The proliferation of process improvement methods over the past decade has become problematic. The range of process improvement methods now includes BPM, Lean, Six Sigma, Lean Six Sigma, Operational Excellence (OpX), Process Excellence (PEX), Reengineering (BPR) and several older techniques such as the theory of constraints (TOC) which are still in use in some organizations.
As process improvement professionals develop increasing skill in a selected improvement method, they are inclined to think and communicate that their method is better than alternative approaches to process improvement. Executives seeking to improve operational performance are sometimes confused about the similarities and differences between various methods and feel that they “have to choose a side.”