Interesting approach I didn't know about. Definitely worth trying. I like how it seems to bake risk management in.

It will fluctuate with time so it needs to be kept in check. Indeed, some things are commodities so can be decided upfront, but the rest of the functional envelope will change over time. Also make sure you drive the project by risks to have early feedback where it matters most.

Very good primer on a widespread and very hard to avoid bias. This is why it's hard for projects to properly meet deadlines.

Good blueprint for building up and following up (the most important part really) of a strategy in your organization.

Wise words, if you're always too busy and overloading your team, it's a sign of something... but what? It's important to know since it's what will drive the necessary conversation you need to have.

This is a good piece. Killing all planning is indeed not a good thing. Setting plans in stone wasn't a good thing either, it's no reason to go to the other extreme.