Inventory Management Without a Warehouse Degree

Inventory management is the art of having exactly the right amount of stuff at exactly the right time. Too much inventory ties up cash and takes up space. Too little means stockouts, angry customers, and lost sales.

The ABC method categorizes inventory by value: A items (20% of products, 80% of revenue) get the most attention, B items are moderate, and C items are low-value, high-quantity. Focus your forecasting energy on A items.

Safety stock is your buffer against the unexpected. Calculate it based on lead time variability and demand variability. A simple formula: safety stock = (max daily sales × max lead time) - (avg daily sales × avg lead time). This prevents stockouts without over-ordering.

Reorder points tell you when to order more. Reorder point = (average daily sales × lead time in days) + safety stock. Set these up in your inventory system and never manually count to decide when to reorder again.

Just-in-time (JIT) inventory minimizes stock by ordering only when needed. It works beautifully until a supply chain disruption hits and suddenly you have nothing to sell. Use JIT for predictable items, keep safety stock for everything else.

Tools matter: for small operations, a spreadsheet works. For growing businesses, use Cin7, TradeGecko, or Shopify's built-in inventory. For serious operations, NetSuite or SAP. The tool should match your complexity.

Dead stock is money sitting on shelves dying slowly. Review inventory monthly, identify items that haven't sold in 90+ days, and liquidate them — flash sales, bundles, donations for tax write-offs. Dead stock doesn't age like wine; it ages like milk.

Forecasting is imperfect but essential. Use historical sales data, seasonality patterns, and market trends. Even a rough forecast beats ordering based on gut feeling.