Design a restaurant application that gives the expected waiting time based on waiters, tables, and customers.

To design a restaurant waiting time application, we'll model the core entities: waiters, tables, and customers. A database will store their information. Waiters will have unique IDs and track the tables they serve. Tables will have identifiers, capacity, and status (occupied/free). Customers will be recorded with arrival time and party size. The waiting time can be estimated by analyzing average table occupancy duration, current table availability, and the number of parties waiting. We can further refine this by considering waiter efficiency and table turnover rates.