Utilisation is argued about in percentages and paid for in trips. Five percentage points sounds like nothing in a meeting and is a real number in a budget. Converting between the two is straightforward, and doing it once usually settles whether a packaging change is worth pursuing.
From percentage to trips
Take the annual volume in units. Work out how many units fit per vehicle at the current utilisation, then at the improved figure. Divide the annual volume by each. The difference is the number of trips saved in a year. On a weekly lane moving a few thousand units, five points is typically three to eight trips.
From trips to money
Multiply the trips saved by the cost per trip, including the return leg where the empties travel on the same vehicle. With a subcontracted route this is the rate on the invoice. With an own-account fleet it is the marginal cost of an additional run, which is smaller and still worth counting.
From trips to carbon
The same figure converts straight into avoided transport emissions, and that is increasingly what customers want when they ask about Scope 3. A utilisation gain is a small operational change with a defensible number attached, which is a more useful combination than it sounds.
What it does not save
Utilisation does not reduce the packaging spend per unit, and it can raise it where a tighter box needs better dunnage. It does not reduce packing labour either, because the same number of boxes still has to be closed. Saying so in the case prevents the saving being oversold and then dismissed.
Where the five points actually come from
Usually from the footprint: a size that divides the deck better, or a stack height that recovers a layer. Sometimes from the internal layout, where a better dunnage arrangement allows a shallower box. Rarely from the board specification, which is where attention usually goes first.
What to verify before claiming it
That the denser pattern is stable – a fuller load that arrives damaged is not a saving. That the handling equipment copes with the taller or tighter stack. And that the gain holds on the other vehicle formats the route uses, which have to be drawn separately rather than assumed.
Presenting it without overclaiming
Quote the trips saved, not the percentage. Percentages invite argument about the baseline; trips translate directly into money and into emissions, and they are hard to dispute once the unit volumes are agreed. Where the figure depends on an assumption about vehicle availability, say so and give the range.
The most useful thing a utilisation case can contain is the measurement method, so that the improvement can be verified after the change rather than taken on trust. Reviewers remember the cases that could be checked.
Where the improvement usually is not
Rarely in the board specification. Reducing wall thickness saves a few millimetres per box and buys almost nothing across a layer, while costing stack strength. The recoverable volume is nearly always in the footprint and the stack height, which is why the first thing to draw is the deck rather than the panel.
What we can do
We build PP corrugated turnover boxes and will draw the load plan for each vehicle format on the lane, so the improvement is visible rather than asserted. Send us the part and the route. How to present the result is covered in how to put the case to finance.