The Server Risk Score provides management with a single, easy-to-compare measure of how reliably each server is handling customer orders. It combines order failures, server availability, and response speed using the most recent seven days of monitoring data.
A lower Risk Score is better. Servers are ranked from the lowest Risk Score to the highest.
| Measurement | Target |
|---|---|
| Order error rate | 1% or less |
| Timeout rate | 1% or less |
| P95 order latency | 3 seconds or less |
| Median order latency | 2 seconds or less |
A score of approximately 100 means the server's combined performance is at the target levels shown above. A score below 100 indicates better overall performance, while a score above 100 indicates increasing operational risk.
The score is not capped, so a severely unhealthy server may have a score significantly greater than 100.
Because actual order tests occur less frequently than availability checks, the calculation applies a conservative statistical adjustment to the observed order error rate. This prevents a server from appearing completely risk-free simply because no failures happened to occur in a limited sample.
As more successful observations are collected, this uncertainty adjustment becomes smaller.
All measurements use a rolling seven-day period containing up to:
The score is recalculated regularly. This allows the rankings to reflect recent performance while the seven-day window prevents isolated events from causing excessive short-term movement.
The Risk Score is an operational decision aid, not the probability that a server will fail. It is designed to answer a practical management question:
Which servers currently offer the best combination of order reliability, availability, and response speed?