Score an application delivery tier across availability, latency, errors, utilisation, SSL load and persistence, and name the weak spot.
Each metric is normalised onto a 0–100 subscore, inverting the ones where lower is better and penalising utilisation in both directions since an idle pool is wasted spend and a saturated one has no failover room. The weights put availability and latency first because those are what a user experiences. An ADC tier can be green on every individual dashboard and still be one node failure from an outage, so a single weighted score with the weakest dimension named is what makes the next piece of work obvious.
ADC Health Score
score = 0.30×availability + 0.20×latency + 0.20×errors + 0.10×utilisation + 0.10×SSL headroom + 0.10×persistence hit rate, each normalised to 0–100.
score = 0.30×availability + 0.20×latency + 0.20×errors + 0.10×utilisation + 0.10×SSL headroom + 0.10×persistence hit rate, each normalised to 0–100. Each metric is normalised onto a 0–100 subscore, inverting the ones where lower is better and penalising utilisation in both directions since an idle pool is wasted spend and a saturated one has no failover room. The weights put availability and latency first because those are what a user experiences.
An ADC tier can be green on every individual dashboard and still be one node failure from an outage, so a single weighted score with the weakest dimension named is what makes the next piece of work obvious.
This calculator takes 7 inputs: Pool member availability, Average pool member utilisation, p95 response time, p95 response time target, 5xx error rate, SSL/TLS processing utilisation, Persistence lookups that hit. The pre-filled defaults are a realistic starting point — replace them with figures from your own environment for a result you can act on.