PLT (Product Lead Time)
PLT (Product Lead Time) is the total clock from placing a purchase order to having sellable stock: manufacturing, freight, customs clearance, and receiving at the fulfilment centre, added together. It is the physics of replenishment — the interval you cannot compress with enthusiasm.
What is PLT?
PLT (Product Lead Time) is the total clock from placing a purchase order to having sellable stock: manufacturing, freight, customs clearance, and receiving at the fulfilment centre, added together. It is the physics of replenishment — the interval you cannot compress with enthusiasm.
Every reorder decision is made against it. When the forecast says demand is coming in eight weeks and the product takes ten weeks to arrive, the decision about what to do was made long before the forecast changed.
Where lead time actually goes
Four segments, each with its own variability. Manufacturing covers raw-material sourcing and production. Freight covers ocean or air transit. Customs covers clearance and inspection. Receiving covers intake at the fulfilment centre, which is rarely instant.
Most sellers track the total and are then surprised by it, because the total hides the spread. The manufacturing leg may be stable while the freight leg swings by a fortnight depending on port congestion, and receiving delays cluster around peak periods. Managing lead time means managing each segment with its own realistic range — and planning against the pessimistic end of it, not the average.
Using it to set reorder points that hold
Lead time feeds directly into the reorder calculation: average daily velocity multiplied by lead time, plus safety stock. Get the lead time wrong and the reorder point is wrong in the same direction — and the consequence of understating it is a stockout, which costs ranking as well as revenue.
The better practice is to measure rather than assume. Track actual segment durations from your own orders rather than relying on a forwarder’s estimate, refresh them seasonally, and hold a buffer that reflects known variability rather than a round number. Sellers who treat lead time as a measured quantity rather than a quoted one stop having the same stockout every year.
In practice
A seller’s historical data gives a 30-day manufacturing run, 25 days of ocean transit, 5 days of customs clearance, and a 10-day receiving window — a total lead time of 70 days. With that measured figure, they trigger reorders when stock falls to an 85-day supply, and the replacement lands just as the buffer narrows. Velocity never breaks and capital is not over-committed to stock.
How Harpy Media helps
Supply-chain timing is part of our operations work: lead times measured segment by segment from the brand’s own shipments, reorder points set against real numbers, and buffers sized to observed variability rather than optimism.
PLT FAQ
What is product lead time?
The total elapsed time from submitting a purchase order to having sellable stock — covering manufacturing, freight, customs clearance, and receiving at the fulfilment centre.
Why does lead time matter so much?
Because it sets the reorder point. If you order too late relative to lead time, you stock out; too early, you tie up capital and storage. Accurate lead time is the foundation of every replenishment decision.
How do I reduce lead time?
Not by assuming it away. Compress the segments you control (production scheduling, booking discipline, prep quality), consider air freight selectively for urgent volumes, and hold local buffer stock in peak periods. Mostly, plan accurately rather than optimistically.
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