Verifying a Factory’s Capacity for an Underwear Order (2026)

Quick answer. A monthly output figure does not tell you whether your order can be scheduled into a site. Capacity is what is left after the orders already booked, so the useful questions are how many lines the style would run on, what those lines are doing now, and how many days your order would occupy them.

1. Why a monthly figure does not answer the question

• It describes the site, not your order. A site producing a large monthly volume can still have no free days in the window you need.
• It is an average. Output across a month includes the peaks and the idle periods, and your order lands in a specific one.
• It is not a schedule. Capacity is a rate; whether your order fits is a question about a date.
• What it is good for. A sanity check on whether the site is of the right scale, and nothing beyond that.

2. The three figures that do answer it

• Lines assigned. How many lines the style would run on, since the number of lines is what sets the daily output for the order.
• Daily output per line. For this construction, at this level of detail — not for the site’s simplest product.
• Days it occupies. Which follows from the two above, and is the figure your delivery date depends on.

Read together, those three tell you what the order will occupy and when — which is what the delivery date is actually made of.

3. The questions that produce those figures

• Which lines would run this style? A specific answer rather than a general one, since the style is what sets the output.
• What are those lines running now, and until when? The queued work is what stands between you and a start date.
• How many units per line per day for this construction? Not for a simpler one.
• What would put the start date back? Material, pattern, or another order — the answer tells you which risk to watch.
• How does the peak season change it? The seasonal queue lengthens the production stage rather than the transit.

4. What a plausible answer looks like

• Specific line numbers. A site that schedules its work can name them; a vague answer usually means the schedule is not fixed yet.
• A named current job with an end date. Which is what makes the start date for your order predictable.
• An output figure that matches the construction. A complex style runs slower than a basic one, and the figure should reflect which one is being quoted.
• A stated constraint. Every site has one, and knowing which it is tells you what to check later.

5. Where capacity questions go wrong

• Asking about the site instead of the order. The site’s output is the wrong unit.
• Accepting a range so wide it excludes nothing. A figure that could describe any order does not describe this one.
• Skipping the queue. The current workload is what determines the start date, not the capacity.
• Ignoring the peak. The same order occupies the same lines for longer during the seasonal queue.
• Not asking what would push it back. Which is the question that turns into a schedule discussion later.
• Treating an answer as a commitment. Capacity information is an input to a plan; the commitment is the delivery term in the contract.

6. Turning the answer into a plan

• Build the schedule backwards from the retail date. The line occupancy and the queue are then checked against it rather than the other way round.
• Identify the constraint. Whether the limit is material, pattern or another order, since the response differs for each.
• Note the peak effect. Against the bulk dates rather than the freight window.
• Confirm the producing site in writing. Capacity answers are about a place, so the place has to be named.
• Re-check at the point of order. Because the queue moves between the enquiry and the order.

7. How to compare two suppliers

• Same three figures. Lines, daily output for this construction, and days occupied.
• Both with a named current job. Which is what makes the start date comparable.
• Both with a stated constraint. So the two risks can be compared rather than only the two dates.
• Both against the same window. Capacity in a window you cannot use is not capacity.
• Both with the producing site named. Since the figures describe a place rather than a company.

Published: 2026-10-15 · Xiamen Unitex Trade Co., Ltd. — OEM & ODM underwear sourcing partner

Unitex Underwear (Xiamen Unitex Trade Co., Ltd.) — OEM/ODM underwear sourcing and supply-chain partner in Xiamen, China; in the trade since 2009, incorporated in 2013. Based in the Xiamen–Quanzhou–Jinjiang knitwear cluster, Fujian Province, south-east China.