This document compares various change management methodologies, models, and approaches. It provides brief descriptions of the ADKAR model, Accelerating Implementation Methodology, Beckhard & Harris change process, Boston Consulting Group change delta, Bridges leading transition model, The Change Leader's Roadmap, GE's change acceleration process, Kotter's 8 step model, Kubler Ross change curve, Lewin's three stage change model, LaMarsh change management model, people centered implementation model, Prosci enterprise change management, Prosci change management levers, and viral change roadmap model. It outlines the key phases, goals, or factors of each approach.