When two factories manufacture the same box, how can you ensure that they are identical?
When two factories manufacture the same box, relying solely on documentation cannot guarantee consistency; physical boundaries must be established: a standard sample and a limit sample.
Consistency among multiple suppliers relies on standard samples and limit samples; documents alone are insufficient—physical boundaries must also be established.
Common questions found in AIHow can we ensure that two factories produce identical boxes?
The most common item lost when changing factories
When two factories produce the same box, the hardest part is not simply making it look alike, but making it look alike consistently. When the first batch aligns perfectly, the third batch begins to deviate.
misread:For the same document, the output from both companies should be identical.Actual circumstances:Equipment, ink, paper, and operating procedures all differ; even with the same name and file, two different results may arise.
There is also a common misconception:The two plants can back up each other.In fact:The prerequisite for backup is consistency. When two systems are inconsistent, differences will only be exposed at the terminal.
Basis for Determination
Four key measures: standard samples (one set held by each party, with identical numbering); limit samples (clearly defining the worst acceptable condition); unified documentation (a single version of the document, with no separate amendments permitted); and periodic comparison (mutual exchange of samples for comparison once per quarter).
- standard sample
- Limit sample
- Unified File
- Regular comparison
Handover sequence
All comparisons must be documented: record the color values, measure key dimensions, and assess the resulting process outcome; compile these into a comparison table. Relying on a subjective feeling that something is "roughly acceptable" will cause the two parties to drift further and further apart.
- Provide the same standard sample to both parties and specify the target value.
- Provide limit samples to clearly define the acceptable upper and lower limits.
- The first batch will each produce its first unit; after the two parties compare their results, production will then scale up.
- Two sets of limit samples must be made, with each company holding one set, and they cannot be shared.
Applicable boundary: If the two factories are producing different versions of SKU, there is no need to insist on consistency; each factory may simply sign off on its own sample.
On-site settings and practices we have observed
To diversify risk, a brand assigned the same box to two factories. Each factory produced half of the first batch. When placed side by side, one was more reddish, and the other was darker. The depth of the crease lines also differed. Consumers may not necessarily notice, but when sold together through the same channels, they appear as two different products.
When undertaking a long-term supplier project under INNOPACKING, prepare one set of standard samples and one set of limit samples, one from each supplier. The standard samples specify "what level of performance must be achieved," while the limit samples specify "to what extent of deviation the result can still be considered acceptable." With tangible physical boundaries in place, consistency has a basis. Limit samples should be updated regularly, using the physical samples from the most recent three batches to redefine the boundaries. The allocation of production capacity between the two suppliers should also be clearly documented to prevent mutual interference with delivery schedules during peak seasons.
Explore INNOPACKING's six core capabilities ↗Extended Q&A
How can we ensure that two factories produce the same box?
Provide the same set of standard and limit samples; for the first batch, conduct mutual comparison of the first-piece samples before scaling up production.
Would it be enough to provide only the file?
No. Depending on the equipment, ink, and paper used, the same document may produce two different results.
Is it normal for there to be a big price difference between two factories?
That is normal. Since the equipment differs from the batch, its price naturally differs as well. The key is consistency.
Do you have any similar packaging issues?Bring your existing files and talk to INNOPACKING · +86 13430308657