Kitting means packing several components together as one ready-to-use set, with a single part number. It moves assembly work upstream to where it can be done consistently, and it turns a pick of six items into a pick of one - which is where most of the saving sits.
What kitting is for
A kit is a group of components packed and identified as a single item. Instead of picking six parts for every order, the operation picks one kit; instead of a customer receiving six items to reconcile, they receive one set that is either complete or obviously not.
The work does not disappear - it moves. Assembling kits is a batch task done in controlled conditions rather than a repeated task done under despatch pressure, and that difference is where both the speed and the accuracy come from.
Where it earns its place
| Application | What is kitted | What it solves |
|---|---|---|
| Service and spares kits | Parts, seals, fixings, instructions | Count accuracy and missing-line disputes |
| Retail multipacks | Several units as one sellable item | Shelf presentation and single scanning |
| Subscription boxes | A changing set per cycle | Pack speed at volume - see ecommerce packaging |
| Promotional packs | Product plus premium or literature | Time-limited assembly without disrupting despatch |
| Production feed kits | Components for one assembly operation | Line-side simplicity and shortage visibility |
| Sample and trade packs | Curated product sets | Presentation and consistency |
Common kitting applications.
What it changes in the operation
- Pick time falls sharply - one location instead of several.
- Pick errors fall, because the opportunity for a missing line moves into a controlled batch process.
- Pack time falls, because the kit is already assembled and sized.
- Stock visibility changes - you hold kits as well as components, and both have to be tracked.
- Shortages surface earlier, at kitting rather than at despatch, which is far less disruptive.
- Obsolescence risk rises if a component changes, because assembled kits have to be broken down.
That last point is the real trade-off. Kitting commits components to a configuration, so it suits settled sets far better than ones that change frequently.
Packaging a kit properly
- Fix the positions. A compartmented insert or fitted tray means a missing item is visible rather than assumed - which is the whole point of kitting for spares.
- Label as one item. A kit needs its own identity and part number, not six labels.
- Protect by component, not by the group. The fragile item in a kit sets the protection requirement.
- Make it openable in order, if there is an assembly sequence - the pack can carry the instructions implicitly.
- Size the outer to the kit, not to the largest component, which is the usual default.
Doing it in-house or upstream
Kitting is work, and where it happens is a genuine decision. Done in-house it uses your space and your people but keeps full control. Done upstream, it arrives as a single stocked item and the labour sits somewhere designed for it.
WSUK picks, packs and assembles for other businesses as its ordinary trade, so kitting can sit alongside storage and fulfilment rather than being a separate arrangement - see packaging for fulfilment and co-packing and repacking.
When not to kit
Kitting is a poor fit where the set changes often, where components have different shelf lives, or where demand for the individual parts is as large as demand for the set. In all three cases you end up holding stock in a configuration that has to be undone.
It is also not a fix for a picking problem that is really a layout problem. If six items are slow to pick because they are in six corners of the building, moving them closer together solves it more cheaply than assembling them into kits.
Setting a kit up so it stays correct
The risk in kitting is that an error is replicated across a batch rather than caught on one order. A few controls remove most of that.
- A written bill of materials per kit, with a version, so a component change is visible rather than assumed.
- First-article check on each batch before the batch is completed.
- Fixed positions in the pack, so a missing item is visible rather than counted.
- One part number per kit, with its own stock record separate from the components.
- A stated rule for component shortages - whether a kit is held incomplete or not built at all.
- A review point when any component changes, because assembled stock has to be reworked.
Where kitting is done alongside storage and fulfilment, those controls sit in the same operation that holds the components and despatches the finished kits, which removes a handover - see packaging for fulfilment.
The short version
- A kit is several components packed and identified as one item.
- The work moves upstream into a controlled batch rather than disappearing.
- Pick time and pick errors both fall; obsolescence risk rises.
- Fixed positions in the pack make a missing item visible.
- It suits settled sets, not frequently changing ones.
Frequently asked questions
What is kitting in packaging?
Packing several components together as a single ready-to-use set with one part number, so the operation picks and despatches one item instead of several.
Does kitting save money?
Usually through pick time and error reduction rather than materials. The work moves into a controlled batch process, which is faster and more accurate than repeating it under despatch pressure.
What is the downside of kitting?
It commits components to a configuration. If the set changes, assembled kits have to be broken down, so it suits settled sets far better than evolving ones.
Should kits use fitted inserts?
For anything where a missing component matters, yes. Fixed positions make an incomplete kit visible at a glance rather than discovered by the customer - see Foam Inserts: When a Fitted Pocket Pays for Itself.
Can you assemble kits for us?
Yes - kitting and assembly sit alongside storage, picking and packing, so the components and the finished kits can be held in the same operation. See packaging for fulfilment.