TREAT EVERY HIRE LIKE AN EXPERIMENT
In "World War Z", there's a profound quote by the scientist trying to cure the virus in the movie.
He says, "Sometimes the thing you thought was the most brutal aspect of the virus turns out to be the chink in its armor. It loves disguising its weaknesses as strengths."
The most brutal aspect of hiring is its unpredictability.
It's estimated we get hiring right ~50% of the time.
We can all think of hires we thought would work out, but didn't - or that wouldn't work out, but did.
It's easy to view this unpredictability as a weakness.
The reality is it's a strength, if you're willing to follow Principle 13:
"Treat Every Hire Like an Experiment"
How can hiring's unpredictability be turned into a strength?
By taking the time to document what you thought about candidates (pre-hire), compare that to how they do (post-hire), & then learn from it.
Scientists use documentation to refute or validate their experiment assumptions all the time.
You should too with your hiring process.
Documenting is the price you pay to know.