Unsure if this is where you first read about it, but it’s outlined in this guide: My Journey of 368 days (+ The Ultimate Guide for WK open_book ) in the guide linked at the start. 
There’s some more recent discussion about creating a schedule around the SRS intervals here: Is it okay to review only twice a day? How much would it slow you down??
Edit: yeah whoops thought I was in another thread, edited my post 