Capstone: Hardening a Payment Flow

1. How This Capstone Works

The previous seven lessons introduced seven patterns, and this capstone combines them within one payment flow. It presents seven incidents in the order that teams commonly encounter them because each repair creates or reveals the next problem. Reliability patterns interact as one system rather than operating as an independent checklist.

For each stage, stop at the "pause and decide" section before continuing. Identify the pattern and estimate its important settings, because an interview tests this decision process.