Kitting and light assembly under an outsourcing agreement

The bill of materials stays a client document

The provider builds to a recipe: which components, in what quantity, in what orientation, with which inserts and finished packaging. That document belongs to the client and needs a version, an owner and a change route. Providers that maintain informal build instructions on a shop floor will reproduce whatever was done last time, which is fine until the specification changes and nobody can prove what the current version says.

Component supply is the usual point of failure

A build stops when any one input is missing, so the assembly plan is only as reliable as the least reliable component. Agree who monitors component cover against the build schedule, what notice the provider gives when an input is running short, and what happens to a part-built batch when the line stops. Where components come from several suppliers on different lead times, the coordination effort is real work and should be named in scope rather than assumed.

Scrap, yield and who absorbs the loss

Some components are damaged in handling, some finished units fail a check, and some builds are abandoned when a promotion is cancelled. The agreement should state an expected allowance for loss in normal working, how consumption is reconciled against the build record, what evidence supports a write-off, and who pays beyond the allowance. Without that, every reconciliation becomes a negotiation, and the party with the weaker records tends to concede.

Specification changes mid-run

Changing a build after production has started creates a mixed population of finished units and stranded components. Decide in advance whether existing stock is reworked, sold through or written off, who authorises that decision, and how the finished item is identified so the two versions do not merge in the stock record. Assembling components can also alter how the finished item is described for customs purposes, which is a classification question to settle with the customs authority rather than at the bench.

Frequently asked questions

How should a finished kit appear in the stock record?

As its own item, created by consuming the component quantities defined in the recipe. Recording only the components leaves the client unable to see saleable availability; recording only the kit hides what remains available to build. Both directions have to reconcile, which is a systems requirement to raise during integration.

Who is responsible if an assembled unit is faulty?

It depends on whether the fault came from a component, from the build instruction or from the assembly work. That is why the specification, the acceptance check and the batch records matter: they allow the cause to be identified rather than argued. Product liability itself is a separate legal question to take to advisers.

Is it better to assemble at the fulfilment site or at the supplier?

Assembling at source is usually cheaper per unit; assembling close to demand keeps components flexible until orders are known. Where demand for a particular configuration is uncertain, the later decision often outweighs the lower unit cost.