Packaging trial and approval guide
A staged route for proving that a packaging change works with the product, machinery, storage and distribution system.
A packaging data sheet can support a shortlist, but it cannot reproduce the actual product, machinery, operator method, storage and distribution route. A controlled trial moves from document review to bench checks, line performance, filled-pack conditioning and production release, with evidence retained at each stage.
Use a staged approval route
| Stage | Purpose | Output |
|---|---|---|
| Document review | Check construction, dimensions, intended use and evidence | Approved candidate list and open questions |
| Sample inspection | Measure, photograph and compare physical samples | Sample record and dimensional observations |
| Bench compatibility | Check product contact, closure, seal, label or shrink response | Pass/fail against defined laboratory or manual criteria |
| Machine trial | Run through filling, capping, sealing, labelling, coding and conveying | Settings, output window, defects and operator observations |
| Storage and distribution | Assess filled packs under intended conditions | Leak, seal, appearance, damage and shelf-life evidence |
| Release | Approve specification and change control | Signed sample, versioned record and supplier controls |
Prepare representative samples
Samples should match the proposed production grade, dimensions, colour, closure, label and decoration. Prototype or hand-made samples can answer early questions but should not be treated as proof of production consistency. Record sample source, batch and date.
Define acceptance criteria before the run
- Dimensions and tolerances relevant to handling and fit.
- Fill weight or volume and any product loss.
- Closure application, opening and leakage criteria.
- Seal appearance, strength and contamination tolerance.
- Label position, adhesion, wrinkles, bubbles and code readability.
- Line stops, rejects, rework and operator interventions.
- Case, pallet, storage and distribution condition after the agreed period.
Record the process window
A single successful pack is not enough. Record the machine settings and range that produce acceptable results, including startup, normal running and changeover. Where the packaging only works at the edge of the equipment’s adjustment range, document the risk before release.
FAT and site acceptance boundaries
A factory acceptance test can demonstrate agreed functions using the available samples and test product. Site conditions, utilities, upstream and downstream equipment, production staff and actual distribution may still require separate site acceptance. Define responsibility, sample quantity and acceptance measures in the quotation or test protocol.
Change control after approval
Link the approved sample and trial record to supplier, material, drawing and artwork versions. A change in resin source, recycled content, layer structure, closure liner, adhesive, dimensions or manufacturing site should trigger review of the affected tests.
Create a release record that production can use
The release record should identify the approved sample, drawing, artwork, component suppliers, machine settings, inspection method and permitted tolerances. State which observations are informational and which are stop criteria. Keep retained samples or controlled photographs where practical, and give purchasing, quality and production access to the same version. This prevents a successful development trial from becoming an undocumented production exception.