When did estimates turn into deadlines?

I learned something important early in my career: the first number you put out will be remembered.

Unfortunately it’s often true. People keep saying: "but didn’t you initially say X?"

"Sure I did, but I have new knowledge" won't always work.

A nasty side-effect is that people who are aware of this shy away from giving you numbers.

> Kirk: Mr. Scott. Have you always multiplied your repair estimates by a factor of four?

> Scotty: Certainly, sir. How else can I keep my reputation as a miracle worker?

There’s a whole generation of developers who have internalized this.