How to Pick the Fastest Line at the Supermarket | New York Times [Debunk]

“[…] Choose a single line that leads to several cashiers

Not all lines are structured this way, but research has largely shown that this approach, known as a serpentine line, is the fastest. The person at the head of the line goes to the first available window in a system often seen at airports or banks. […]”

Sourced through the New York Times

${Mean\, time\, in\, system = \frac{Mean\, number\, of\, customers\, in \, system}{Mean\, service\, rate}}$