Official websites use .gov
A
.gov website belongs to an official
government organization in the United States.
Secure .gov websites use HTTPS
A lock (
) or https:// means you've safely
connected to the .gov website. Share sensitive
information only on official, secure websites.
Waiting time example. In this example a sample process takes an average of 4 minutes and 12 customers arrive randomly per hour. Time (minutes) is presented on the y axis. Top: the total process time, with the service time in blue and the wait time in red. Bottom: the number of customers in the process at any one time.
