Which fast food places are you going to that take 20 minutes to make your food? I only eat fast food a couple times per month, at most. However, I have never waited 20 minutes to receive my food order.
This reminds me of something that bugs me locally.
The large grocer in our area has a deli counter that also makes sandwiches.
One one of the cases is a sign saying, "your deli order can be left at the counter and will be prepared while you do the rest of your shopping."
Often there is only one attendant at the deli order end and one making sandwiches. Sometimes the wait is 5 minutes or more. Candy often gives up on ordering if the wait is long. I often ask the person why would anyone wait in line to give a written order and then come back and wait again to pick it up?
Managers come up with brilliant ideas, where if they knew how things worked they would realize it would be a better idea to hire more help.
jtk
"A pessimist sees the difficulty in every opportunity; an optimist sees the opportunity in every difficulty."
- Sir Winston Churchill (1874-1965)