Beyond Apdex: Defining a Precise SLA for Performance
summary
Introduces a replacement for Apdex called the Consumer Performance Index that grades sites 0–100 based on how well load times match real user expectations rather than competitor rank. CPI uses Soasta mPulse data — soasta.com/cpi — and models 8 billion user experiences measuring wait time against behavioral outcomes to derive the threshold T and track changes over time. Claims the metric returns an actionable threshold and adapts as expectations shift.
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