Reorder point = daily forecast × lead time + safety stock. When available stock + stock on order falls below it, you get a suggestion sized to reach your target days of cover (default 60) after arrival, rounded up to MOQ and case pack. Stockout date: when forecast sales use up available stock, counting open POs/transfers on their arrival dates. Order-by date: the last day to order so stock arrives before you dip into safety stock. Both recalculate daily.