The Summers Principle
0055 Probability Over Time Not Certainty Per Event
Last Updated: August 4, 2026A common objection to the principle: I know operators who defaulted on almost everything and got lucky. They...
0015 The Summers Principle
Last Updated: August 4, 2026Every operating outcome in a restaurant — every Guest kept or lost, every cast member who stays or...
0020 What Externalities Do
Last Updated: August 4, 2026Operators want an exception. The market turned. The lease renewed hot. A key cast member quit. A review...
0025 What Design Is
Last Updated: August 4, 2026Design is engineered intent. That is the definition. But engineered intent is a phrase most operators have never...
0030 What Default Is
Last Updated: August 4, 2026Default is the absence of engineered intent. That is the definition. But absence is the wrong word to...
0035 There Are Only Two Causes
Last Updated: August 4, 2026The principle claims there are only two causes of outcomes inside the operating domain of the restaurant. Design...
0040 Not Designing Versus Designing Not To Design
Last Updated: August 4, 2026There is a distinction inside the principle that most operators miss on the first read, and that missing...
0045 Capacity Is Subject To The Principle
Last Updated: August 4, 2026The operator hearing the principle for the first time often lands on a version of this objection: I...
0050 Mode Not Purity
Last Updated: August 4, 2026The principle names two operating modes: design and default. In practice, no operator runs pure design on every...
0085a Incentives Are Physics, Not Levers
Last Updated: August 4, 2026The Frame Every incentive in your operation is either designed or defaulted. There is no third state. This...