Safety Stocker is a quick and easy Safety Stock Calculator.
Need to figure out the inventory needed to stay in stock? Still haven’t memorized those Z values? Misplaced your Inverse Normal tables?
Safety Stocker calculates the safety stock you need and expect based on: average demand, reorder lead time, demand volatility, lead time volatility, and required service level.
The safety stock is calculated with the following equation:
Safety Stock = Z (based on service level) * sqrt((LeadTime * Sqr(Stdev(Demand))) + (Sqr(Avg_Demand) * Sqr(Stdev(LeadTime))))