FrankFeng:The raw material might become a type of waste for Starbucks. The factory supply the raw material to the store, the quantity of the raw materials will become a waste. For example, the factory supply the milk, syrup or anything else that is made for 5000 cups of coffee, and if the sales volume didn’t get to 5000 cups of coffee, the material that remaining at the end of the day, they only can by discard, so that is the waste from raw materials.
The solution of it, is to reference the store sales everyday, and find the average demand from material and use that data to stock the raw material from the factory