This commentary is part of an ongoing dialogue that began in the October 2011 special issue of "Performance Improvement"--Exploring a Universal Performance Model for HPT: Notes From the Field. The performance improvement/HPT (human performance technology) model represents a unifying process that helps accomplish successful change, create resiliency and sustainability, and make things better in the workplace. Models are very helpful to illustrate and gain consensus regarding performance improvement efforts. The authors feel that the performance improvement/HPT model in its past, present, and potential future iterations is not the only model for the field; however, it makes a systematic and flexible contribution to the field. (Contains 2 figures.)