What Breaks when a Million People use your AI App

The features decide whether your AI app works once. The Non-functional requirements (NFRs) decide whether it keeps working for everyone, under load, while the world misbehaves. Here is the full map, told through the things that actually break.

A demo proves one good answer. Production has to serve good answers to millions of people, over and over, while traffic spikes, models drift, and costs pile up. This is the map of Non-functional requirements (NFRs) for AI apps at scale, the twelve things that decide whether your app survives, explained through what goes wrong when each one is missing.