Most packaging line disappointments trace back to arithmetic done too late. Three habits keep a new line honest before the first machine is ordered.
Start from the bottleneck, not the brochure
A line runs at the pace of its slowest station on its worst product. Name that station deliberately — usually the filler or the wrapper — and buy its rate first. Sizing every other machine slightly faster than the bottleneck is what keeps the whole line breathing.
Buffers buy back the stops you cannot prevent
Label reel changes, film splices and reject bursts are facts of life. An accumulation table sized for two or three minutes of bottleneck output between critical stations turns those micro-stops into non-events instead of line stops. Buffer after the machines that stop most, not where the floor happens to have space.
Count the seconds of every transfer
Product falls over in transfers, not on straight belts. Every dead plate, every curve, every height change is a place to lose the takt you paid for. Walk the layout as a product would travel it, and challenge each transfer to justify itself.
Write the takt into the acceptance test
A line rate that lives only in the sales meeting is a wish. Put the number, the product and the duration into the FAT protocol, and the whole conversation about performance happens before shipment — where fixing things is cheap.
