The phrase "drawing process" refers to the act or technique of creating a picture or image using pencils, pens, or other artistic tools. Full definition
When he left the academy at 18 or 19, he continued with that life drawing process in his studio where he was able to choose his own models. (studiointernational.com)
However, this isn't something that is likely to happen overnight as the entire switch over can be a long drawn process. (goodereader.com)
Making toast doesn't sound particularly complicated — until you're asked to draw the process step by step. (inc.com)