Several parts. One reference.

Group parts and their variants into a referenced kit — with its own code, price, lead time and history — and order it as a single line instead of a pile of parts. Defining the kit happens here; building it is the assembly service’s job, and the two are one click apart.

Send your BOM as one product →The system vs. the service ↓

Quick definition

An assembly on OperGo is a kit defined in your account: which parts go in, in which variant, and how many of each — saved as one reference with its own price, lead time and order history. Defining the kit is the platform side of the story; physically building, testing and packing it is the Assembly & Kitting service. You order the reference as a single line, and reorder it to the exact same spec in two clicks.

How a kit is defined

From a pile of parts to one orderable line.

  1. 01

    Pick the parts — and the variant of each

    Any parts already in your account qualify, each in the exact finish variant the kit needs: the body in matte black, the bracket in raw aluminum, the seal in EPDM.

  2. 02

    Group them with quantities

    Two of one part, one of another, four screws. The grouping is your bill of materials, written once — not re-attached to an email every time you order.

  3. 03

    The kit becomes one reference

    The assembly gets its own code, price and lead time, quoted as one product by an engineer — the BOM-as-one-product quote, not a per-part spreadsheet you have to add up.

  4. 04

    Order it as a single line

    One line on the order, one price, one delivery. Reordering repeats the exact same spec — same parts, same variants, same quantities — in two clicks.

Two halves of one kit

The system defines it. The service builds it.

Keeping the two apart is deliberate: the reference is yours to define and reorder forever; the physical build is work you add when the kit should arrive as one tested unit.

The system · this page

Define the kit as one reference

Which parts go in, in which variant, and how many of each — saved once, priced as one product, ordered and reordered as a single line. The kit lives in your account next to its quotes, orders and history.

Start with your parts →
The service · assembly & kitting

Build, test and pack that kit

The physical half: the referenced kit assembled, functionally tested and packed before it ships — so what arrives is one finished unit, not components. Add it when the kit shouldn’t arrive as parts.

See the assembly service →

Proof at scale

+50 base components, combined into every single SKU.

A designer switch & socket brand runs its whole product line on this grouping logic: every switch, socket and cover plate it sells is an assembly of base components in specific finishes, resolved to one reference. Scaled up with the catalog’s encoding, that’s over 1.5 billion orderable combinations.

Read the full case study →

Assemblies, answered

Is this the same as the Assembly & Kitting service?

No — and the difference is the point. This page is the system: how a kit is defined as one reference (which parts, which variants, how many). Assembly & Kitting is the service: the physical work of building, testing and packing that kit before it ships. Defining an assembly doesn’t oblige you to have it physically assembled — you can order the kit as grouped parts — and most assemblies use both.

Can each part in an assembly carry its own finish variant?

Yes — that’s what makes it useful. The kit references specific variants, not generic parts: the same assembly definition can exist in a brushed-steel version and a black version, each as its own reference, without re-uploading anything.

How is an assembly quoted?

As one product. Send the parts and the grouping — or a whole BOM — and an engineer prices the assembly as a single line with one lead time, typically within 24–48 hours. You see the kit’s price, not a spreadsheet of per-part quotes you have to reconcile.

How do assemblies relate to the product catalog?

An assembly is the middle rung. Variants make one part many SKUs; an assembly groups those parts into a kit; the product catalog goes one level further and encodes every valid combination of parts and finishes as generated product codes. If you have one kit, an assembly is enough — the catalog is for when the kit itself has thousands of versions.

Can an assembly be held in stock?

Yes. A kit reference can be produced ahead and held as finished stock in our warehouses like any other reference, and shipped on your behalf when you sell — see Stock & Fulfillment.

Is the process behind each part locked once the kit is defined?

No. Each part keeps its own manufacturing process, and none of them is locked in — if volume grows to where a part prices better in another process, an engineer moves it, and the kit reference and how you order it stay exactly the same.

Variants & finishes →

The rung below: one part managed as hundreds of orderable SKUs.

Product catalog →

The rung above: every valid combination of parts encoded as a generated product code.

Assembly & kitting →

The physical half: your kit built, tested and packed before it ships.

Ready? Go.

Get a price an engineer will stand behind.

Send one part or your whole BOM. An engineer reviews it with the shop floor and sends back a real price, a real lead time and free DFM notes.

Get my quote →

Free account, no commitment · NDA signed before you upload.