Empty space inside packaging is easy to notice and harder to judge. Some gaps allow for cushioning, product movement during handling or separation of delicate surfaces. Others result from using one oversized box for several unrelated products. A useful review distinguishes these cases before recommending a smaller carton.
The aim is to identify a packing change worth testing. It is not to remove protection until a shipment becomes as small as possible. Keep the supplier or packing specialist involved so that dimensional savings and product protection are assessed together.
Describe the present configuration
Begin with a finished package, not a product drawing. Record the outer carton dimensions, product quantity, internal dividers and protective materials. Photograph the package before opening, during unpacking and after the product is removed so the original arrangement can be understood.
Ask whether this is the standard production configuration or a sample prepared for the review. A carefully packed sample may use different materials from routine orders. Note who packed it and which revision it represents.
Identify the reason for each major gap. The supplier may need access for packing, space around an irregular shape or room for accessories. If nobody can explain a gap, mark it for investigation rather than immediately classifying it as waste.
Map space by function
A simple drawing can separate the product envelope, necessary separation, protective material and unexplained voids. These categories make a discussion more precise than a photograph covered with arrows saying “too much space.”
Do not infer package performance from density alone. A tightly fitted item can still damage its carton, and an apparently roomy package may protect a vulnerable protrusion. The relevant question is whether the whole configuration is appropriate for the product and expected journey.
The IMO/ILO/UNECE CTU Code is a useful primary reference for broader cargo packing practice. For the product package itself, ask the responsible supplier or qualified packaging party to explain the intended protection and suitable validation.
Quantify a proposed change
Consider a hypothetical product shipped in a 60 × 50 × 40 centimetre carton. Its outer volume is 0.12 cubic metres. A proposed revised carton measures 60 × 45 × 40 centimetres, giving 0.108 cubic metres. The reduction is 0.012 cubic metres per carton, or 10%.
For 50 cartons, the geometric difference is 0.60 cubic metres. This calculation identifies the scale of the opportunity; it does not establish a 10% freight saving. Minimum charges, weights, service rules and other costs can change the commercial result.
It also does not prove that the narrower carton works. Keep the proposal labelled as unvalidated until the supplier confirms product fit, packing repeatability and the agreed performance checks. A measured reduction and an approved packing change are separate milestones.
Check what the change affects
Reducing one dimension may change how cartons fit on a pallet, how staff place the product inside or where labels can be attached. Ask the supplier to show the full revised configuration, including accessories and any packing instructions that change.
Consider the receiving process too. If an item becomes difficult to remove without damaging its surface, some apparent packing efficiency may simply move work and risk to the destination. Ask the receiving team to review opening access before approving the design.
Keep comparisons consistent. A proposal that removes an accessory from the main carton must include the new accessory package in its total. Otherwise the review celebrates space that has merely moved to another box.
Prepare a trial review sheet
Record the current revision, proposed revision, dimensions, units per carton, materials changed and expected volume difference. Add the reason for the change, the party approving the trial and the criteria that will be checked.
Document the actual trial results without upgrading them into a broad guarantee. Note the number and type of samples examined, any defects observed and any differences between trial and production packing. If the agreed assessment requires a specialist test, obtain that assessment rather than replacing it with a few photographs.
Include an operational check: can regular packing staff reproduce the arrangement using the written instructions? A configuration that depends on the designer being present may be difficult to maintain across routine orders or a second supplier.
Decide using the whole result
Compare confirmed dimensional benefits with added materials, labour, handling and any unresolved concerns. Keep the old configuration available until the new one is approved for the relevant product and order. Do not mix revisions silently within one shipment.
Use the CBM calculation guide to check volume arithmetic and the English freight-cost overview to prepare a consistent quotation request. After the next production run, compare actual packed measurements with the approved trial. An empty-space review is successful when it produces a repeatable, documented improvement, not merely a smaller number on a purchasing spreadsheet.
Ask the factory to retain an approved packed sample or a sufficiently clear reference record for the new configuration. Include the carton code on that record. When a substitute box is used because the preferred stock is unavailable, the packing team should know that the substitution needs review rather than assuming any smaller box is acceptable.