Lead Time

What is lead time?

Lead time is the total elapsed duration from the moment a purchase order is placed with a vendor to the moment finished goods are received, inspected, and available for allocation at the distribution center. In apparel merchandising, lead time encompasses raw material sourcing, fabric production, garment manufacturing, quality inspection, export logistics, ocean or air freight, customs clearance, and DC receiving — a chain of sequential and sometimes parallel activities that typically spans 90 to 180 days for offshore production.

Lead time is the single most important constraint on apparel buying calendars. It determines how far in advance buying decisions must be made, how much forecast uncertainty the business must absorb, and how quickly the supply chain can respond to in-season demand signals.

Why lead time matters in apparel

Lead time determines the boundary between what a merchandising team can react to and what they must predict. Every day of lead time is a day of forecast uncertainty:

• →Longer lead times increase forecast risk: A buy decision made 6 months before selling requires predicting demand with far less information than a decision made 6 weeks before selling. Each additional month of lead time typically reduces forecast accuracy by 5–10 percentage points.
• →Lead time constrains chase ability: When a style outperforms plan, the ability to reorder depends entirely on production lead time. A 120-day lead time means a reorder placed in week 3 of the selling season will not arrive until 4 months later — well past the season's end.
• →Late deliveries compress selling windows: A 2-week delay on a 12-week selling program reduces the full-price selling window by 17%. For seasonal categories like swimwear or outerwear, late deliveries can be catastrophic.
• →Lead time drives inventory investment: Longer lead times require larger safety stock buffers and earlier receipt commitments, increasing working capital requirements.

Lead time in practice: apparel example

A women's bridge brand sources from three vendor tiers with different lead time profiles:

• →Domestic (Los Angeles): 30–45 day lead time. Used for 15% of the assortment — chase-eligible basics and replenishment styles. Higher cost per unit but enables in-season reaction.
• →Near-shore (Central America): 60–75 day lead time. Used for 25% of the assortment — key items with moderate demand predictability. Balances cost and speed.
• →Offshore (Southeast Asia): 120–150 day lead time. Used for 60% of the assortment — seasonal fashion and volume programs where cost efficiency is critical.

The buying calendar is structured around these tiers. Offshore POs are confirmed 5 months pre-season with limited change windows. Near-shore POs are placed 3 months out with one revision opportunity. Domestic POs can be placed 6 weeks before delivery, enabling the team to react to early selling signals from the offshore-produced initial floor set.

Common mistakes

• →Quoting factory production time as total lead time — production may take 45 days, but fabric sourcing adds 30 days and logistics adds 30 days, making actual lead time 105 days
• →Assuming lead time is fixed — lead times vary by season (Chinese New Year adds 2–4 weeks), order size (small orders receive lower priority), and fabric complexity (custom prints take longer than stock fabrics)
• →Failing to distinguish between calendar days and working days — a quoted lead time of "60 days" from a factory that operates 5 days per week is actually 84 calendar days
• →Not building contingency into the buying calendar — a plan that works only if every delivery arrives exactly on time is not a plan, it is a prayer