Might a restaurant prefer customers who order similar things?
Predictable demand is easier to serve than unpredictable demand.
Restaurants generally want customers to enjoy a wide range of menu items. Operationally, however, predictability has advantages.
The hidden mechanism is demand concentration. When ordering patterns become somewhat predictable, restaurants can prepare ingredients, schedule staff, and manage inventory more efficiently.
Imagine a restaurant where demand suddenly shifts unpredictably between dozens of menu items each day. Purchasing and preparation become significantly more difficult.
A second-order effect develops because predictable orders improve forecasting accuracy. Better forecasts reduce waste, which improves consistency and customer satisfaction.
People often think restaurants manage recipes. Many spend just as much effort managing uncertainty between recipes.
