The Summers Principle - T$P
The Summers Principle is the governing law of the man-made restaurant system: every operating outcome in a restaurant — every Guest kept or lost, every cast member who stays or leaves, every dollar earned or extracted — exists due to one of two causes: design, or default. There is no third cause. A restaurant is not a natural system. Nothing in it exists without a human decision to put it there. The building was built. The lease was signed. The concept was chosen. Design is engineered intent applied to the system — the operator has thought about what they want the system to produce and built the system to produce it. Default is what the system produces when engineered intent is absent — whatever the environment, the cast, the Guest, and the ambient forces produce on their own. The Summers Principle sits above the five fundamentals. Perspective, People, Product, Performance, and Profit all run inside it. Every outcome any of them produces is either designed or defaulted, and the operator's job is to know which one is running at every moment, in every domain, at every scale.