Critical Flow Reliability Assessment
Know what is verified and what needs evidence.
Before Peak Traffic
Peak traffic changes load shape and downstream demand. Test the event’s conditions, not average load.
Questions worth answering
- Which transaction must still complete under peak?
- What traffic mix, data shape, and duration are representative?
- Which downstream limit can dominate the flow?
The outcome to protect
Protect accepted transactions from queue saturation, downstream throttling, and correctness failures.
How we investigate
Test bursts and sustained load, queue growth, autoscaling delay, dependency throttling, graceful degradation, and correctness within an agreed scenario.
Decisions & outcomes
- A scenario-specific capacity envelope
- Known limiting dependencies
- Prioritized validation and engineering actions
Fast requests can still leave reservations behind
A fictional scenario, not a customer result.
The question to resolveWill a promotion preserve inventory reservations when the reservation consumer falls behind?
- Promotion traffic
- Reservation queue
- Inventory consumer
- Reservation confirmed
Observed in the exercise
The agreed staging burst left a reservation backlog after request latency returned to normal. Queue drain and reservation correctness need separate acceptance criteria.
- Evidence basis
- Tested
- Verification result
- Partially verified
- Freshness
- Fresh
Uncovered dependency
The supplier inventory feed was simulated. Its production response during the promotion is unknown.
- Evidence basis
- Unknown
- Verification result
- Unverified
- Freshness
- Unknown
The resulting decision
Define a safe backlog boundary and admission-control response; verify drain and reservation expiry with representative dependencies before the promotion.
Scope of this example
This fictional exercise reports no traffic capacity or customer result. The actual load shape and acceptable outcomes must be agreed for the selected flow.
Relevant service
Choose one critical flow.
Tell us what must work and what you need to know. We agree the scope before delivery.