IT Managers, if you learn nothing else in your entire career, learn this:

An unskilled programmer is radically worse than none at all.

A programmer with twice the skills of another will probably get TEN TIMES AS MUCH DONE!

Even with good programmers, adding people to a project doesn’t always help, and it can harm. A lot.

That’s all.

Learn only this, and in my experience, you will already be a better-than-average IT manager.