Lead Time Meaning: What It Is and Why It Matters
Lead time is the time between placing an order and receiving it. In inventory management, it usually means supplier lead time — how long from raising a purchase order to the stock arriving on your shelf. It’s a critical number for avoiding stockouts.
What does lead time mean?
Lead time measures delay. The most common type is supplier (or procurement) lead time: the days between sending a purchase order and receiving the goods. There’s also delivery lead time (order to customer) and manufacturing lead time (start to finished product).
Why lead time matters
Lead time directly drives when you need to reorder. The longer it takes a supplier to restock you, the earlier you must reorder to avoid running out. Underestimate it and you face stockouts; overestimate it and you tie up cash in excess stock.
Lead time and reorder points
Your reorder point is built from lead time: reorder point = (average daily sales × lead time) + safety stock. Accurate lead-time data is what makes reorder points reliable.
How to reduce lead time
- Work with responsive, nearby or backup suppliers.
- Order earlier ahead of peak periods like 11.11.
- Track actual lead times over time rather than relying on quoted ones.
Frequently asked questions
What is lead time in inventory? The time between placing an order with a supplier and receiving the stock.
How does lead time affect reordering? Longer lead times mean you must reorder earlier; lead time is a core input to your reorder point.
Related reading: The complete inventory management guide · Purchase orders 101.
