The Inventory Truth: Forecasting, Safety Stock, and What to Fix First

Check the record before changing the forecast

An inventory forecast is only useful when the starting stock position is credible. Compare system balances with physical counts and investigate differences in receiving, picking, returns, and adjustments. Separate available stock from goods that are damaged, reserved, or still awaiting inspection.

Focus early checks on products with frequent movements or repeated discrepancies. A regular cycle-count routine can reveal where records lose accuracy without waiting for a full stocktake. Fix the underlying transaction or handoff as well as the number in the system, otherwise the same discrepancy is likely to return.

Understand demand and replenishment together

Look beyond an average weekly sales figure. Promotions, seasonal changes, large one-off orders, and periods when a product was unavailable can all distort the picture. Record those events alongside sales history so the next forecast reflects what actually happened.

Review replenishment lead times with the same care. Measure the interval from placing an order to having usable stock, including receiving and inspection. If that interval varies, a plan based only on the supplier's typical dispatch time may underestimate how long the business needs to cover demand.

Revisit the safety-stock decision

Safety stock provides a buffer against uncertainty, but it also ties up space and working capital. Set the buffer in relation to demand variability, replenishment reliability, and the consequence of a stockout. Different products may need different service priorities rather than a single rule applied across the range.

Start with a small group of important products and review both stockouts and excess stock after each replenishment cycle. When results miss expectations, check the assumptions before simply increasing the buffer. Better records, smaller process delays, or more reliable replenishment may solve the problem more effectively.

• Confirm the usable stock balance
• Annotate unusual demand and out-of-stock periods
• Measure replenishment through availability for picking
• Review buffers alongside stockouts and excess inventory