Symbol N

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…gap already discussed, and the fraction of wall-clock time the fleet is not running at all. A workable capacity model has to account for both. A simple way to state the assumption explicitly is $T_{\mathrm{fleet}} = N \cdot P_{\mathrm{device}} \cdot U_{\mathrm{sustained}} \cdot A$. where N is the device count, $P_{\mathrm{device}}$ is a single device’s measured (not advertised) throughput on the actual workload, $U_{\mathrm{sustained}}$ is the utilization fraction observed over a representative multi-hour or multi-day window rather than a benchmark’s best run, and A is availability —…

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