Waiting time in emergency department by simulation.

The aim of research was to reduce waiting time at ED. Population includes the patients who received services in ED. The arrival and service times in different stations were collected for 663 patients. For data analysis, SPSS and simulation technique were used. Results shows that add one intern to the Ear Nose Throat (ENT) service makes the most reduction on the waiting time from 112.19 to 99.24 minutes. Health care managers, in the ED are usually physicians who are not familiar with principals of management.