Three suppliers receive the same two-line enquiry and return quotes differing by forty per cent. Everyone concludes the market is unpredictable. Usually the enquiry simply did not contain the information that drives cost, so each supplier priced a different product.
Describe the job, not just the item
“Box in corrugated PP sheet, 400 by 300 by 200″ invites three interpretations. “Box holding twelve kilograms of machined steel parts, stacked four high for eight hours, washed weekly at sixty degrees, barcode scanned at two points” invites one. The second version also lets the supplier tell you the construction will not work, which is worth more than a low quote.
Say which dimensions are mandatory
Some dimensions are dictated by equipment or pallets and cannot move. Others are preferences. Marking which is which lets the supplier propose a cheaper standard size when that is available, and stops them silently changing a dimension that matters. This single distinction generates more usable quotes than any other change.
State the acceptance test
If there is no stated test, every supplier assumes a different one. Say how you will decide whether a delivery is acceptable – a drop test, a load test, a dimensional check, a visual standard – and the quotes will converge because everyone is pricing to the same pass mark.
Volumes and call-off pattern
Unit price depends heavily on batch size and frequency, and suppliers will guess conservatively if not told. Annual volume, typical order quantity and whether you can accept pallet-quantity deliveries all move the number more than most material choices do.
Reference samples beat drawings sometimes
Where a pack exists already, sending the physical sample alongside the drawing removes a dozen ambiguities for free. Where it does not exist, say so – “no existing reference” changes how carefully a supplier will read everything else.
Ask for the exclusions explicitly
Tooling, carriage, testing, artwork origination and minimum order quantities are where surprise costs live. Ask for each to be listed separately, or state that quotes must be on a specified basis. More detail on that sits in what a trial order should include.
What happens next
A good specification gets you comparable quotes and it also gets you honest objections, because suppliers can see what will not work. That is worth having before tooling rather than after, and it is why we ask more questions than most people expect.
The specification nobody writes down
The most useful paragraph in any packaging specification is the one describing what happens at end of life – whether units are returned, how they come back, who pays, and what condition is acceptable. It costs nothing to write and it prevents the most common structural failure in reusable programmes, which is a pack that works and a return flow that does not.
Include it even for single-trip items, because it tells the supplier what disposal route matters and therefore which materials are appropriate. A supplier who knows the pack is going to a specific recycling stream will specify differently, and usefully.
What we can do
We quote polypropylene packaging against specifications and against descriptions of the job, and we prefer the second. Send whatever you have – even a photo and a sentence – and we will tell you which three pieces of information we still need rather than quoting a guess.