A decision-analysis technique developed by Kurt Lewin in the 1940s that maps the forces driving a proposed change against the forces resisting it. Each force is named, weighted, and assessed for whether it can be amplified (drivers) or weakened (restrainers).
The technique excels for change-management decisions because it shifts attention from the abstract question "should we do this?" to the operational question "what specifically is helping and hindering?" — which leads directly to an action plan.