Imagine you work in a mechanic’s shop. You just got trained today on a new part install, including all the task-specific tools it takes to install it.

Some are standard tools, like a screwdriver, that most people know how to use. Others are complicated, single-purpose tools that only work to install this one part.

It takes you a couple of hours compared to other techs who learned quicker than you and can do it in 20 minutes. You go to bed that night thinking “I’ve got this. I’ll remember how this works tomorrow and I’ll be twice as fast tomorrow as I was today.”

The next morning, you wake up retaining a working, useful memory of only about 5% on how to use the specialized tools and installation of the part.

You retrain that day as a review, but your install time still suffers in comparison. You again feel confident by the end of the day that you understand and go to bed thinking you’ll at least get within 10-20 minutes of the faster techs in your install.

The next morning, you wake up retaining a working, useful memory of only 10% on how to use the specialized tools.

Repeat until you reach 100% mastery and match the other techs in speed and efficiency.

Oops! Scratch that! We are no longer using those tools or that part. We’re switching to this other thing that somehow everyone already knows or understands quickly. Start over.

This has been my entire development career. I’m so tired.