Brands rarely die of one bad order; they bleed out through stockouts of their best product. The prevention is arithmetic — reorder points built from real lead times — plus supplier arrangements that shorten the pipeline. Here is the working math.
The short answer
- Set a reorder point of daily sales rate times total lead time in days, plus safety stock, and track weeks of cover against that lead time: when cover approaches it, the reorder is already slightly late.
- Count lead time end to end, from reorder confirmation to receiving: commonly 10–16 weeks for a custom program at sea, while a stock program compresses to weeks. Start safety stock at two to four weeks of average sales for sea-freight custom programs.
- Watch weekly sell-through by size and color: a hero style at 30%+ weekly sell-through on its launch buy will stock out before a sea-freight reorder lands, so the decision point is earlier than instinct says.
The only formula you need
Reorder point = (daily sales rate × total lead time in days) + safety stock. Total lead time is honest end-to-end: reorder confirmation, fabric booking, production, inspection, freight, receiving. For a custom program at sea, that is commonly 10–16 weeks; a stock program compresses to weeks.
Safety stock covers the two variances: demand spikes and supply slips. A simple starting rule — two to four weeks of average sales for sea-freight custom programs, less for fast-replenishment stock — then tune with your own data.
Why reorders are faster than first orders
Everything decided is time saved: the block is approved, the sealed sample stands, colors are on file. A reorder goes straight to fabric booking and line scheduling — no sampling calendar at all. At SEAMDANCE, repeat programs run against the retained standard, re-verified per lot, which is also what keeps color and fit identical across reorders.
The remaining long pole is fabric: custom colors need dye-lot scheduling. Brands that stabilize core colors can pre-book greige or fabric positions and cut reorder lead time dramatically — worth negotiating once volume is proven.
Reading the signals early
Weekly sell-through by size and color is the instrument panel: a hero style at 30%+ weekly sell-through on its launch buy will stock out before a sea-freight reorder lands — the decision point is earlier than instinct says. Size-curve breaks (sold out of M, deep in XS) can justify a size-specific top-up rather than a full run.
Set a standing weekly review: units left ÷ weekly rate = weeks of cover, compared against total lead time. When cover approaches lead time, the reorder is already slightly late.
Structures that de-risk the pipeline
Split deliveries (one production run, staged shipments), stock-program bridges (100-piece minimums make a gap-filler order rational), air-freighting a small tranche of a sea reorder for continuity, and forecast-sharing with your production partner so capacity is reserved before your PO exists.
This is where a managed network earns its keep: multi-category brands consolidate reorders across product lines into shared shipments, and dependable ship dates make the arithmetic above actually hold. Stockout prevention is mostly boring reliability, purchased in advance.
Quick answers
When should I place my first reorder?
Watch weeks-of-cover against total lead time from launch week one. Strong launches often justify a reorder within two to three weeks — earlier than most founders expect, which is why the formula beats the vibe.
Can I reorder just one size or color?
Within stock programs, yes at small minimums. In custom programs, fabric-lot minimums apply per color — size-only top-ups within an existing fabric position are often feasible; ask before assuming either way.
How can I shorten the lead time on activewear reorders?
Start with fabric, the remaining long pole: stabilize core colors so greige or fabric positions can be pre-booked, which can cut reorder lead time dramatically and is worth negotiating once volume is proven. Sharing forecasts lets your manufacturer reserve capacity before your PO exists, and keeping the approved block, sealed sample and colors on file means the reorder needs no sampling calendar.
Sourcing styles for your line? The 2026 catalogue lists every ready-to-develop style — colorways, materials, quote list built in.