This is a model for choosing what to do at any given moment. It is based on the idea of focusing only on what you can possibly do where you are with what you have.

The physical, emotional or intellectual horsepower you need to complete an action. It's good to always have some really easy things you can do when you're not feeling on top of your game!

The practice of filtering action choices by their relative importance.

The habit of filtering possible actions based on whether the time you have is sufficient to complete them.