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 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 a 98% on-time record makes 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.