Queueing Theory

M/M/c metrics for 1–3 servers — utilization, queue length, wait, and time in system — with a live wait-vs-utilization curve you can drag.

Watch the same system run parcel by parcel: arrivals, a shared line, and one or two service positions, with the simulated averages settling onto the exact values.

The formulas behind both — Little's Law, utilization, Erlang C, and the M/M/1 and M/M/c results — each with what it means and when to reach for it.