Mixed Small Orders: Multi-Head Utilization

The workload being modeled

This example represents a shop with many 1–8 piece orders rather than long repeat runs. It is where “total head count” can be a misleading purchasing metric.

Target	160 good pieces in the modeled window
Design	7,000 stitches per piece
Order mix	20% caps
Average same-design batch	5 pieces
Production window	5 days × 7 hours/day
Model allowance	3% rejects/rework; one operator

Key result: with an average same-design batch of five, a two-head synchronized machine models 80% head utilization and a four-head only about 63%. Two independent single-heads model about 368 good pieces/week versus roughly 307 on a synchronized two-head under the same sewing/handling assumptions.

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	5.4/hr	184	100%	Machine
2 independent single-heads	10.8/hr	368	100%	Machine
2-head synchronized	9.0/hr	307	83%	Machine
4-head synchronized	13.6/hr	460	62%	Machine
6-head synchronized	27.1/hr	921	83%	Machine

The decision this scenario is actually testing

Independent machines can split different customer jobs while a synchronized bar normally wants identical work across its heads. That flexibility has economic value even when the synchronized machine wins on floor space or operator simplicity for large runs.

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 this mean multi-head machines are bad for small shops?

No. It means batch structure matters. A shop with frequent 48- or 72-piece repeats can use synchronized heads very differently from a shop dominated by one-off names and tiny logo runs.

How do I estimate my real average batch?

Look at recent jobs and calculate the number of pieces that truly share the same design, thread setup and production sequence—not simply the total pieces on each invoice.

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