Why should you care?

Unobserved insecure systems fail loudly in production.

See it live — copy this example

These are architecture exercises: fill templates, draw boxes, write ADRs. No cloud bill required.

# Metrics That Matter
Control: Metrics That Matter
Threat addressed: ...
Signal/alert: ...

What happened?

• Tie the control to a threat and a detectable signal.
• Follow the steps below — typing the code yourself is the fastest way to learn.

Practice next

1. Fill the template for your platform or a product you know.
2. State one trade-off explicitly (“we give up X to get Y”).
3. Draw a 5-box diagram on paper.
4. Add a failure mode.
5. Remove one unnecessary component.

Remember

You can explain Metrics That Matter simply. You captured a trade-off. You have a tiny artifact (table/diagram/ADR).

Metrics That Matter design review

ArchDesk stakeholders challenge your take on metrics that matter.

Outcome: You defend it with qualities and consequences.