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From tech pack to shipment: understanding production lead times

Where the weeks actually go on a production order, which delays are the factory's fault and which are the buyer's, and how to plan a calendar that survives contact with reality.

14 May 2026 · 5 min read · Production planning

Ask a factory for its lead time and you will get a tidy number: sixty days, perhaps ninety. Ask where an order actually spends its life and the answer is messier, because the clock is shared between the factory, the mill, the forwarder and, more often than buyers like to admit, the buyer. Understanding the anatomy of a lead time is the difference between a calendar and a wish.

The anatomy of an order

As a rough rule of thumb for a typical cut-and-sew programme, the journey breaks into five phases. Development and sampling commonly takes two to four weeks per round, and most products need more than one round. Fabric and trims, once approved, typically need three to six weeks to knit or weave, dye and finish, longer for yarn-dyed or specialist constructions. Bulk production usually runs four to eight weeks depending on quantity and complexity. Inspection, packing and documentation absorb about a week. Then transit: sea freight from Karachi is commonly around four to five weeks to the UK or Northern Europe and broadly similar to the US East Coast, while air moves in days at many times the cost.

The critical path is rarely sewing

Buyers watch the sewing lines, but orders are more often late because of what happens before them. Lab dip approvals that sit in an inbox, a branded trim with a single approved supplier, a fit comment round that takes three weeks to turn: each of these sits on the critical path, and every day lost there is lost at the end. Map the approvals as carefully as the production.

The delays buyers cause

It is an uncomfortable truth of the industry that a meaningful share of delay originates on the buyer's side: late tech packs, slow approvals, mid-order changes and payment terms that hold fabric booking hostage. None of this is a criticism; buyers are busy. It is simply an argument for building buffer where you control the clock, and for a partner who chases your approvals as politely and relentlessly as they chase the factory.

Book capacity like it is stock

Factories sell time. Around peak seasons, good factories sell out of it, and orders confirmed late are either declined or squeezed. Signalling volumes early, even provisionally, reserves capacity and protects both price and delivery. The buyers who ship on time in October are usually the ones who talked to the factory in May.

A calendar that survives reality

Professional orders run on a time and action calendar: every milestone from fabric booking to vessel cut-off, with an owner and a date. The calendar only works if it is watched weekly and if slippage triggers action rather than a shrug. Build modest buffers at the stages history says are fragile, agree in advance what happens if a milestone slips, and keep one honest version of the truth that both sides can see.

The bottom line

Lead time is not a number a factory gives you; it is an outcome you engineer. Know where the weeks go, guard the approvals you control, book capacity early and run the order on a living calendar. Do that, and the tidy number might even come true.

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