The first delivery of a new box is the only moment when a specification error is cheap. After that, the boxes are in service and the error is a fleet-wide problem. Twenty minutes of checks before signing is the highest-return activity in the whole purchase, and it is usually skipped because the delivery note matches the order.
Measure, do not trust the label
Measure the external envelope at three points and the internal clear dimensions at the narrowest point. External dimensions decide whether the box fits the shelf, the pallet and the rack; internal dimensions decide whether the part fits. A box can be right on both and still fail at a corner radius, so check the internal corner too – that is where a part that measures fine on paper jams in practice.
Stack it, loaded, and leave it
Stack five boxes at the specified load, in the orientation they will be used, and leave them for an hour. What you are looking for is whether the boxes locate on each other or walk, and whether the bottom box deflects. A stack that looks fine when built and has leaned by the end of the hour has a rim problem that will show up in week two as collapsed stacks.
Lift it by the handle, one-handed
Lift a loaded box by one hand hole, which is how boxes are actually lifted, and see what happens. This is the test that catches an unreinforced opening before the fleet does. Then lift it by two handles and check that it feels balanced – a box that is awkward to lift gets dragged instead, and dragging is what destroys bases.
Check the details that were specified
Drainage holes present and sized below the smallest part. Label panel flat, recessed and in the agreed position. Dividers present, fixed rather than loose, and in the agreed layout. Lids fitting, and closing with the same action the operator will use. Colour correct if colour coding is in play. Each of these is a line in the specification and each of them is easy to get wrong in a first run.
Confirm the markings
Serial numbers legible and starting where agreed, date code present, and any owner marking correct. If the boxes are going into a tracked fleet or across a border, the markings are the scheme – a missing serial number is a box that cannot be counted. The full inspection approach is set out in first article inspection for reels.
What to do when the first article fails
A failed first article is the cheapest failure available and it should be treated as good news, because it happened before a thousand boxes were made. The response is not to accept the boxes and note it for next time: it is to stop, agree what is wrong in writing, and get it corrected before the production run. A supplier who has made an error will usually correct it quickly at this stage and slowly at any later one.
Write down what is wrong rather than describing it verbally, with photographs and measurements, and agree whether the existing boxes are usable, reworkable, or scrap. Where the error is dimensional, the boxes are usually scrap. Where it is a missing feature or a detail, they are often reworkable and worth keeping as a trial population. Either way, the production run should not start until the specification has been amended in writing and the supplier has confirmed the change – verbal confirmation at this stage is where the same error appears in the full delivery.
What we can do
We supply PP corrugated turnover boxes with a first article that is the production article, and we will tell you what to measure before you sign. Send us the specification and we will send the check list with the delivery rather than after a query.