The mark of a Change Surgeon is their ability to diagnose the root cause of an organizational issue that is impacting the health of the entire system. For this reason, Change Surgeons find the greatest enjoyment in helping clients carefully, compassionately, and reliably assess underlying issues impacting their performance. However, unlike a general physician, they seem to be fit to develop a specific area of OD expertise including tools that help clients address what is ailing them. Change Surgeons often craft their area of expertise further by focusing on a specific system of the organization, much like a body. The skeletal system (organizational structure), the cardiovascular system (sustainability), the nervous system (strategic coordination and vibrancy), the digestive track (mergers, new leaders, unplanned change), the respiratory system (endurance), as well as physiological functions that eliminate waste (process improvement), and so on.