I have a small plastic bag with dice in it stuck to my cubicle wall. Below it are the instructions on how to use the “Project Time Estimator.”
The project director came into my cube a few days ago to ask how long a particular task would take. I got the trusty dice out, threw them, and read off the number of hours. She said, “You can't do that!” whereupon I pointed out that I had been doing this for the last two software releases, and it worked as well as any other method.
She wrote down the number of hours and quietly walked away.
PERT, eat your heart out!