The brief as it arrived
This is a fictional demonstration case created for a coursework assignment; no real brand, buyer or order is described. A gifting company placed an enquiry for a December programme: four colourways of the same warming pad, three logo versions across those colours, packs of six, and one delivery window. The customer's own client list was not disclosed, which is normal; what mattered was that the packs had to be ready on a fixed date and could not be topped up afterwards.
On paper this is one order with variations. In production it is four orders sharing a line, and the difficulty is not volume but the boundaries between them: which colour goes in which carton, which logo on which colour, and how a supplier keeps a colourway from leaking into the next batch.
Why a mixed run breaks the normal planning model
A single-colour order is planned as a quantity: buy components, book a line, run, pack, ship. A mixed run is planned as a matrix, and every cell has its own minimum, approval and risk of contamination. Four colours mean four pigment batches, four sets of parts kept separate on the line, and four chances to pack the wrong unit into the right box.
The economics follow. Per-unit cost in a mixed run is higher than in a single-colour order at the same total volume, and the difference is not paint. It is changeover time, segregated storage, additional inspection points and administrative load at the packing table. A buyer expecting single-colour pricing for a four-way split has misunderstood what they are buying.
Building the colour matrix and the ratio packs
The matrix had four colours and three logo versions, but not twelve combinations: two logo versions were locked to specific colours and the third applied to the remaining two. That reduction came from the customer's own plan and halved the number of distinct stock units. Buyers usually have more freedom here than they assume.
The ratio packs were the second decision. Packs of six could be single-colour, mixed within a colour family, or fully assorted. Single-colour packs are simplest to build and easiest to audit; assorted packs look better in a gift context and cost more to pack. The programme settled on single-colour packs with assorted master cartons, which kept the packing table simple while giving variety across a case.
Once the matrix is fixed it belongs in the purchase order as a table with a quantity per cell, not as a sentence. A split described in prose will be interpreted differently by the factory, the forwarder and the receiving team.
Variant table: where a mixed run accumulates cost
| Stage | Single-colour order | Four-colour run | Control that helps |
|---|---|---|---|
| Components | One batch of housings | Four colour batches, four minimums | Reserve batch quantities at order |
| Line changeover | None | Four changeovers plus cleaning | Sequence light to dark, clean between runs |
| Colour approval | One master sample | One master per colour, signed | Name the master in the sign-off record |
| Artwork | One version | Three versions across four colours | Version number on every dieline and proof |
| Packing | One unit into one box | Four units into four boxes | Carton mark per colour, not per order |
| Inspection | One sampling plan | Sampling per colour and release | Apply the plan per variant |
| Storage | One pallet stack | Segregated by colour and logo | Physical labelling at the pallet |
Artwork and version control across variants
Three logo versions meant three print plates for the box and, in one case, a pad-printed mark on the product. Each version needed its own proof, and each proof a version number that appeared on the dieline, the carton mark and the packing list.
The failure this prevents is specific: a carton with the right colour and the wrong logo, discovered after packing. Because the box is the last artefact produced and the first seen by the recipient, an artwork error is the most visible kind of error in a gifting programme. One proof signed once for a family of variants is not approval of each variant; it is approval of a layout.
Colour matching across materials
A warming pad puts three coloured surfaces in one box: housing, contact surface and printed carton. They are different materials with different colour behaviour, and paint on a moulded housing, pigment in a silicone sheet and ink on board will not match under every light. A buyer who approves them in isolation meets the mismatch when the pack is opened.
The answer is a master set. Approve the housing against a physical standard, the silicone against the same standard under the same lamp, and the box print against a contract proof, then record the light source used. Silicone is the difficult one: pigment loading changes colour and mechanical behaviour together, so the supplier should confirm that the approved colour and the approved hardness coexist in one sheet specification rather than in two.
Packing, carton marks and the destination split
The programme shipped to three destinations with different logo mixes, so master cartons had to be allocated before packing: destination, then colour, then logo. That produced a packing instruction that fit on one page and a mark scheme that let the receiving team sort without opening boxes.
The carton mark is the cheapest control in the project and the one most often omitted. A mark carrying destination, colour, logo version and pack quantity turns a mixed pallet into something a warehouse can handle; without it the first event at destination is a manual sort and the second is a mis-shipment.
Inspection followed the same structure: sampling per colour rather than across the order, visual checks against each master, and a functional spot check on one unit per colour to confirm the control and plate behaved the same way across batches. Functional behaviour should not vary with colour, and when it does the cause is usually a different component batch rather than the pigment.
Boundary: a mixed run is not a smaller order
Four colours at a quarter of the volume each is not the same purchase as one colour at full volume. The per-unit cost is higher, the inspection load is higher, and the coordination load falls on the buyer as much as the supplier. What the buyer gets is a programme that looks considered on a table, which is the point of gifting.
- Colour variants ≠ cosmetic only. Each needs its own approval and its own inspection sample.
- One order ≠ one production run. Changeovers and segregation are real costs, not overheads to argue away.
- Signed layout ≠ signed variant. Approval must name the version, not the family.
Next step
Fix the colour matrix, pack ratio and artwork versions before the purchase order, then require a master sample per colour and a carton mark per variant. Our team can review a mixed-run plan against those three points via contact; the packaging side is in writing a packaging dieline brief, the approval record in golden sample sign-off.
Prepared for desk-warming sourcing briefs. Numbers shown are placeholders; request measured data per model from the supplier.