The job: deciding the season before it arrives
How it is usually done
Festive planning in most retail businesses happens twice. First in a meeting six weeks out, where categories and rough discounts are discussed. Then again in a WhatsApp group four days before the festival, where the actual offer is decided, usually by the person shouting the loudest about competitor banners.
The second conversation overwrites the first, and nothing is written down in a form anyone can query later. The planner exists to make the first conversation binding, so that the second one is about execution rather than invention.