A structured Factory and Site Acceptance Test is the single best protection for a packaging line purchase. Use this checklist before you sign off.
Why acceptance testing matters
Most packaging line disputes trace back to ambiguous acceptance. A written FAT/SAT protocol removes the ambiguity by defining exactly what 'working' means before payment milestones.
Before the FAT
1. Agree the throughput formula: cases per minute at which product, at which case size, at which board grade. 2. Define quality limits: seal position tolerance, case squareness, scuff rate. 3. Nominate witness times — your engineer should attend FAT.
During the FAT
Run the vendor's machine with your actual product and blanks for a sustained two-hour production run, not a short demo. Verify: cycle rate, changeover time measured with a stopwatch, fault-recovery time, and reject handling. Sign each item on the protocol.
At the site (SAT)
After installation, repeat the same protocol on your floor with your staff operating. Compare results to the FAT report; any drop larger than five percent needs a documented root cause and correction plan.
The YanMao commitment
Every YanMao machine ships with a written FAT protocol, and our commissioning engineers run the same checklist at your site. You receive both reports with the final documentation package.