500 Shirts per Month: Embroidery Capacity

The workload being modeled

This worked example converts a monthly target into a weekly capacity decision. It deliberately uses editable planning assumptions rather than claiming one machine size is universally correct.

Target	125 good pieces in the modeled window
Design	8,000 stitches per piece
Order mix	flat garments
Average same-design batch	24 pieces
Production window	5 days × 7 hours/day
Model allowance	3% rejects/rework; one operator

Key result: with these teaching assumptions, one single-head models about 176 good shirts per 35-hour week. That clears the average weekly volume of 125, so a second head is not justified by average volume alone. A short deadline, seasonal peak or second simultaneous job can still change the decision.

What the same workload looks like on different architectures

The numbers below use the same assumptions as the main planner: 1.45 minutes per 1,000 stitches for flat goods, 2.10 for caps, 1.4 minutes handling for flats, 2.8 for caps and one operator. They are planning examples—not manufacturer ratings.

Setup	Modeled rate	Good pieces/window	Head utilization	First bottleneck
1 single-head	5.2/hr	176	100%	Machine
2 independent single-heads	10.3/hr	351	100%	Machine
2-head synchronized	10.3/hr	351	100%	Machine
4-head synchronized	20.7/hr	702	100%	Machine
6-head synchronized	31.0/hr	1054	100%	Machine

The decision this scenario is actually testing

For a 500-shirt/month shop, the purchase question should usually be “what peak week or deadline is forcing the upgrade?” rather than “what machine can produce 500 shirts in a month?” Monthly averages can hide a three-day corporate order, rush work or time lost to digitizing approvals.

Before using this to buy equipment

Time several real jobs and replace the minutes-per-1,000-stitches assumption.
Measure hooping/loading time separately from sewing time.
Use the actual same-design batch size, not invoice quantity.
Add downtime, maintenance and staffing constraints that matter in your shop.
Run the shortest real customer deadline, not only the average week.

Run your own capacity model Test a deadline

Questions this example should answer

Does 500 shirts a month require a multi-head machine?

Not automatically. At the assumptions on this page, one single-head clears the average weekly load. Multi-head capacity becomes easier to justify when the same designs arrive in larger batches, deadlines compress, or the shop must run concurrent jobs.

What should I measure first?

Measure actual minutes per 1,000 stitches and actual hoop/load minutes on your common shirt. Those two numbers make the calculator far more useful than a brochure SPM rating.

Planning estimate only. The examples on this page are transparent assumptions, not a claim about the sustained output of any specific embroidery machine.