Which statement best describes the purpose of safety stock?

Which statement best describes the purpose of safety stock?

• A. To maximize total inventory value.
• B. To minimize ordering costs regardless of service impact.
• C. To buffer against variability in demand and lead time to reduce stockouts.
• D. To eliminate the need for inventory planning.

Answer: (C)

Safety stock is extra inventory held specifically to cover uncertainty in demand and in how long it will take to receive replenishments. It acts as a cushion so you don’t run out of stock when actual demand turns out higher than forecast or when supplier lead times extend. By absorbing these variabilities, safety stock helps maintain service levels and reduce the risk of stockouts. This is why the statement that describes its purpose as a buffer against variability in demand and lead time to reduce stockouts is the best fit. The other ideas miss the point: safety stock isn’t about maximizing inventory value, nor about cutting ordering costs without regard to service, and it doesn’t eliminate the need for planning—planning determines how much buffer is appropriate.

Safety stock is extra inventory held specifically to cover uncertainty in demand and in how long it will take to receive replenishments. It acts as a cushion so you don’t run out of stock when actual demand turns out higher than forecast or when supplier lead times extend. By absorbing these variabilities, safety stock helps maintain service levels and reduce the risk of stockouts.

This is why the statement that describes its purpose as a buffer against variability in demand and lead time to reduce stockouts is the best fit. The other ideas miss the point: safety stock isn’t about maximizing inventory value, nor about cutting ordering costs without regard to service, and it doesn’t eliminate the need for planning—planning determines how much buffer is appropriate.