EMS vs OEM vs ODM, and Turnkey vs Consigned: The Terms Explained

Electronics manufacturing comes with a handful of acronyms that get used loosely, even by people in the industry. Getting them straight helps when you write an RFQ, compare quotes or decide how much of your product to outsource.

OEM: the brand that owns the product

An original equipment manufacturer (OEM) owns the product. It defines what the product does, owns the design and intellectual property, sells under its own brand and is responsible to the end customer. An OEM may build in-house, outsource everything, or anything in between.

EMS: the partner that builds it

An electronics manufacturing services (EMS) company builds electronics designed by someone else. The core is PCB assembly, but most EMS providers also offer:

• component sourcing and supply-chain management;
• DFM review and prototyping;
• testing (inspection, functional, sometimes in-circuit);
• conformal coating and box build;
• repair and after-market services.

The design and IP stay with the OEM. The EMS partner brings manufacturing capacity, process expertise and quality systems.

ODM: design and manufacture in one

An original design manufacturer (ODM) designs and builds a product, which other companies then sell under their own brands. The ODM often owns the core design. It is quicker to market, but you have less control and less differentiation, and switching suppliers later is harder.

Side by side

Turnkey, consigned and partial turnkey

Within an EMS relationship, the main question is who buys the components.

Full turnkey: the EMS partner sources every component, manages stock and builds the boards. You pay per finished assembly. It is the simplest for you, and the partner's buying relationships often mean better prices and access to parts in short supply.

Consigned (kitted): you buy the components and ship them to the EMS partner, who charges for assembly only. This suits companies with existing supply contracts or special parts, but you carry the work of buying, chasing shortages and managing excess.

Partial turnkey: a mix. You supply some critical or proprietary parts, and the partner buys the rest. This is common and practical.

Which model suits you?

• Startups and new products: full turnkey, so your team focuses on design and customers rather than purchase orders.
• Established OEMs with strong supplier contracts: partial turnkey for key parts, the rest turnkey.
• Products with proprietary or controlled components: consigned for those parts.

Whatever the model, agree upfront who owns excess stock, how alternates are approved, and how shortages are reported. See electronic component sourcing for more on this.

Turnkey electronics manufacturing at Polyfit

Polyfit's EMS division handles component sourcing and supply-chain management, and supports customers from design validation through assembly, testing and packaging, plus repair and refurbishment. Tell us what you need.