What is the primary purpose of safety stock in medical stores?

• A. It is a fixed quantity that never changes with demand.
• B. It guarantees no stockouts under any circumstance.
• C. Provides a buffer against demand variability; roughly calculated as average usage times lead time plus a chosen safety margin or service level.
• D. It should be filled with excess stock for promotions.

Answer: (C)

In medical stores, safety stock acts as a buffer against uncertainty in demand and in supply. It isn’t a fixed quantity that never changes; it should respond to changes in how much is used and how long suppliers take to deliver. The idea is to cover the expected amount of demand during the lead time and add extra protection to handle variability. A practical way to think about it is: estimate the average usage over the lead time (average daily usage multiplied by lead time), then add a safety margin that reflects how much variability there is and the service level you want (the likelihood you won’t run out). That’s why safety stock is described as providing a buffer against demand variability and being roughly calculated as average usage during lead time plus a chosen safety margin or service level. It won’t guarantee zero stockouts, because extreme spikes or delays can still occur, and it isn’t intended for promotions. In short, safety stock helps sustain service levels by accommodating everyday fluctuations in demand and supply.