Reliability Engineering
Address the failure mechanisms a critical flow depends on.
High-Risk Architecture Change
Topology, schema, deployment, or dependency changes can invalidate previous evidence. Identify which capabilities need reverification.
Questions worth answering
- Which flow depends on the changed component?
- Which previous scenario no longer applies?
- What needs verification before rollout proceeds?
The outcome to protect
Preserve critical capabilities as topology, data, deployment behavior, or dependencies change.
How we investigate
Trace affected claims and dependencies. Define representative tests, observation points, safe rollout, rollback, and review responsibilities.
Decisions & outcomes
- Affected-flow and claim map
- Targeted reverification plan
- Rollout decisions with explicit limitations
A new payment adapter changes the evidence boundary
A fictional scenario, not a customer result.
The question to resolveDoes the previous timeout-and-retry result still apply after switching the payment integration?
- Previous adapter verified
- Integration changes
- Affected claims reviewed
- Targeted reverification
Before the change
The previous adapter preserved the selected payment outcome during a bounded timeout exercise. That result is retained, with stale freshness for the changed path.
- Evidence basis
- Tested
- Verification result
- Verified
- Freshness
- Stale
After the change
The new adapter uses different timeout and retry behavior. Its interaction with order creation has not been exercised.
- Evidence basis
- Unknown
- Verification result
- Unverified
- Freshness
- Unknown
The resulting decision
Reverify timeout, retry and idempotency across the changed payment-to-order boundary before using the old result to support a release decision.
Scope of this example
Stale does not mean failed. The new behavior remains unverified; this example does not imply autonomous platform change detection.
Explore the method behind this example
The same scenario continues on the linked page.
Relevant service
Choose one critical flow.
Tell us what must work and what you need to know. We agree the scope before delivery.