Protected function or state

Names the one thing that must keep working, stated as the underlying function rather than its current packaging. Get this wrong and you defend the wrong thing: the specific venue, the specific night, the specific headcount, instead of what actually delivers the value.

Names the one thing that must keep working, stated as the underlying function rather than its current packaging. Get this wrong and you defend the wrong thing: the specific venue, the specific night, the specific headcount, instead of what actually delivers the value.

Example

For guitar night you protect "regular live music-making with these four people," not "Thursdays at 8 in Dave's basement." That phrasing lets you move to Sundays, or to three players, and still count the ritual as intact.