Ingermanson, Randy. “The Snowflake Method For Designing A Novel.” Advanced Fiction Writing, circa 2013. https://www.advancedfictionwriting.com/articles/snowflake-method/.

Designing writing in ever more specific and increasing levels. Start with a logline, then a paragraph, then acts, etc.

Roughly the advice I've given many over the years based on screenplay development experience, but with a clever name based on the Koch snowflake.