Classic article by Paul Graham in 2009 called Maker’s Schedule, Manager’s Schedule.

One reason programmers dislike meetings so much is that they’re on a different type of schedule from other people. Meetings cost them more.

There are two types of schedule, which I’ll call the manager’s schedule and the maker’s schedule. The manager’s schedule is for bosses. It’s embodied in the traditional appointment book, with each day cut into one hour intervals.

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When you’re operating on the maker’s schedule, meetings are a disaster. A single meeting can blow a whole afternoon, by breaking it into two pieces each too small to do anything hard in. Plus you have to remember to go to the meeting.

One of the reasons I went indie is to stay on my own maker’s schedule.