Trust. Without trust, communication breaks. More specifically: In any human interaction, the required amount of communication is inversely proportion… - Ben Horowitz

If you have a great and loyal executive, how do you communicate all this? How do you tell her that despite the massive effort and great job she is doing today, you might fire her next year if she doesn’t keep up with the changes in the business? When I used to review executives, I would tell them, “You are doing a great job at your current job, but the plan says that we will have twice as many employees next year as we have right now. Therefore, you will have a new and very different job and I will have to reevaluate you on the basis of that job. If it makes you feel better, that rule goes for everyone on the team, including me.

I’d learned the hard way that when hiring executives, one should follow Colin Powell’s instructions and hire for strength rather than lack of weakness. By running sales, I understood very clearly the strengths we needed. I made a careful list and set out to find the sales executives with the right skills and talents for Opsware.

Good product managers crisply define the target, the “what” (as opposed to the “how”), and manage the delivery of the “what.” Bad product managers feel best about themselves when they figure out “how.” Good product managers communicate crisply to engineering in writing as well as verbally. Good product managers don’t give direction informally. Good product managers gather information informally.