You start with the big picture then you go adding detail over and over and over until you have a scenes list, character bibles and a clear idea of the story you want to write.
I tried it. The outlining process, usually a burden to me, was fast and interesting.
Reminds me of the snowflake method for writing novels.
https://www.advancedfictionwriting.com/articles/snowflake-method/
You start with the big picture then you go adding detail over and over and over until you have a scenes list, character bibles and a clear idea of the story you want to write.
I tried it. The outlining process, usually a burden to me, was fast and interesting.