If spindle is a conflict prevention method for a highly structured interaction, then crew is a conflict prevention method for a highly fluid interaction.
The logic is that people do want to collaborate as a basic premise but what prevents them from doing that is when the system comes under stress - and these are the situations that need coordination.
Spindle took away the need of interacting face-to-face when things are heated up and created an order hierarchy that was verifiable, impersonal, and functional.
But they all also notice one same thing. Most conflict happens in rush hours when people are under pressure. And it is this face-to-face conflict between waiters and cooks that causes all the trouble. The answer was found and it’s this - a restaurant spindle.