T=T1+T2+T0. back kitchen raw material stocking time is calculated as the time needed between the order being placed and the receipt of the goods, the order cycle is T1, the time between the goods arriving at the store and actually being available for use, the receipt cycle is T2, the number of days needed to place the order in advance is T0, and the stocking time is T, which is calculated by the formula T=T1+T2+T0.