Emergency Room Triage (2D)

ER Controls

Arrival rate 14/min

Treatment beds 4

Deterioration speed 1.0x

Triage strategy

Waiting

–

In treatment

–

Treated (total)

–

Adverse events

–

Avg wait (s)

–

Bed use

–

How it works

This is the flat top-down twin of the 3D ER-triage lab, driven by the identical queueing rules. Patients (dots) arrive on the left at random Emergency Severity Index level (1 critical/red to 5 non-urgent/blue) and wait in the queue lane until a bed on the right frees up. Priority mode always sends the most severe waiting patient to the next free bed; First-come mode ignores severity and treats strictly by arrival order. The longer a patient waits, the more their condition deteriorates — a level-1 patient who is still waiting becomes an adverse event.

bed ← argmin(severity, arrivalTime)   // priority mode
bed ← argmin(arrivalTime)             // first-come mode
severity(t) -= 1  every  (12s / decayRate)  spent waiting

Arrival rate — patients entering the department per minute.
Treatment beds — the department's limited resource.
Deterioration speed — how quickly an untreated patient's condition worsens.
Triage strategy — compare adverse-event counts under priority vs naive FIFO at the same load.

ESI 1 — Critical ESI 2 — Emergent ESI 3 — Urgent ESI 4 — Less urgent ESI 5 — Non-urgent