"Trapped capacity" is not a term most plant managers use, but it should be. It refers to the gap between the theoretical maximum output of your presses and the actual realized output — and the gap is almost always larger than people realize.
How to spot it
Look at your overall equipment effectiveness (OEE) numbers. If your presses are running at 60–70% utilization, that is not because the presses are slow. It is because something upstream or downstream is preventing them from running.
In flexo, the upstream problem is almost always the mounting room.
Where the capacity is trapped
- Changeover delays: Every minute of changeover above the theoretical minimum is trapped press time.
- Damaged sleeve scrambles: Mid-run sleeve replacements cost compounded time.
- Wrong sleeve at the press: Misidentified or mis-staged inventory causes start-stop chaos.
- Lost ramp time: Slow recovery after a stop because the next job kit isn't ready.
The dollar figure
For a typical mid-size converter running 8 presses, the trapped capacity number is usually 15–25% of theoretical output. At $1,500–$3,000 per hour of press value, that translates to seven figures per year of recoverable revenue.
Why it stays trapped
Because nobody owns it. Press operators get blamed for not running fast enough. Mounters get blamed for being slow. The actual problem — the workflow that connects them — has no owner.
The plants that fix this start by giving someone responsibility for the end-to-end mounting-to-press flow. The physical infrastructure changes follow naturally.
The Flexopodz Team
Purpose-built mounting room solutions for flexographic printing.