Scrum Metaphor: Scrum Master as a General Family Physician

Scrum Master is like old fashioned General Family physician who keeps a tab on the general health of the family. He takes care of common medical conditions and advises on healthy practices to keep the family healthy. Family members regularly visit him as well for special reasons.  As the family physician is with the family for a long duration, a trust gets developed between family and him. This trust enables him to become an adviser to the family.

As a family physician is a general practitioner, he may refer family members to specialists if a need arises.  He also keeps himself well aware in the field of general medicine by education and training.