A complex sequence of actions, broken down in step by step mechanics
It's the premise of the book, The Science of Hitting, by Ted Williams and John Underwood.
This book had a much bigger impact on my life than simply helping me learn to be a better baseball player. It affected how I approach learning almost anything.
Ted Williams is largely considered the best pure hitter in the history of the game. He played in the 1940's and 50's and his career was interrupted by two tours with the military in WW2 and Korea. Had it not been, he would likely be at the top in just about every category in the major league record books.
Why was he such a great hitter? It wasn't just that he was a gifted athlete. His skills were finely honed from lots of hard work. More importantly, he broke down the mechanics of hitting a baseball into a series of small movements. He mastered each of those small movements.
I read this book in 1986. It's one of the few books I read multiple times in my early life. I became a much better hitter in baseball. But, now I learned how to break down any skill into the small units of which it is comprised to master it piece by piece.
The book could have been titled, the Science of Skill Mastery.