عرض عملي: FMEA لمسار الدفع (checkout)

خطوة بخطوة

1. Trace the checkout path and list components and dependencies.
2. List failure modes for each: down, slow, wrong, partial.
3. Planned mistake: only analyze services we own. Fix: add the payment provider, DNS, identity, and the shared database cluster.
4. Rate L, I, D and rank.
5. Design degradation for the top three.
6. Turn the top findings into experiments.