EMS services
Box build and final product assembly
Bring the PCBA, firmware, cables and enclosure together as a finished product. Our assembly work connects mechanical integration with final functional checks, identification and pack-out.
What we do
Define the complete product, not only the board
Final assembly depends on how the electronics fit and operate inside the product. Cable routing, connectors, fasteners, thermal interfaces, software and labels all need a released definition. Keep Best coordinates these items with the board assembly and test work.
Manufacturing work
What is included in the work package
| Work area | What we do | What the definition covers |
|---|---|---|
| Mechanical assembly | Enclosure, fasteners and mounting | Drawings, sequence and specified torque or fit requirements |
| Electrical integration | Cables, harnesses, connectors and board interfaces | Connection definition, routing and strain relief |
| Firmware and configuration | Programming, parameters and identification | Released software and configuration records |
| Final functional check | Product operation after integration | Procedure, loads, interfaces and acceptance limits |
| Pack-out | Labels, accessories, packaging and shipment configuration | Approved label files, packing instructions and unit identification |
Your deliverables
What moves forward with your product
- Products assembled to the agreed mechanical and electrical definition
- Configuration and final-test results where specified
- Unit labels and accessories matched to the order
- Pack-out and shipment records agreed for delivery
Engineering in practice
Connect the service to a real manufacturing challenge
Getting started
Provide the whole-product definition
Start with the current product stage, quantities and requested delivery state. The box build quotation checklist identifies the files and decisions for each work package, including items that are still unavailable.
- System BOM with ownership of boards, enclosure, harnesses and accessories
- Mechanical drawings, connector and harness definitions, fit and fastening requirements
- Released firmware, variant settings and programming responsibility
- Final test procedure, fixtures, limits and required records
- Label, serial-number, accessory and packing instructions
The PCBA versus box build scope comparison helps identify whether your existing board package covers the intended product handoff.
Agree the handoff state and acceptance records
| Requested handoff | Definition to agree | Acceptance evidence |
|---|---|---|
| Electronic subassembly | Board, harness and mounting scope; interfaces for the next assembler | Assembly checks and agreed subassembly tests |
| Configured integrated unit | Enclosure, software, variants, labels and operating interfaces | Configuration identity and defined system-functional results |
| Packed product | Approved accessories, documentation, packaging and shipping identification | Pack-out checklist and unit/batch/shipment linkage as specified |
A board test does not cover connector engagement, installed cable routing, configuration or every finished-product function. Use the harness and PCBA integration test guide to define interface checks, then agree final functional-test coverage for the assembled product.
Specify any calibration, safety, reliability or market-compliance work separately with its method, responsible party and acceptance evidence. A manufacturing functional-test pass does not establish product certification.
Review the quality and traceability record chain and state the required unit, batch or shipment level in the RFQ.
Compare the quotation on the same integration scope
Keep recurring product work, engineering preparation, fixtures, lot setup and material obligations visible. The box build cost and NRE comparison guide provides a worksheet for the same finished-product definition and order horizon.
Start a conversation
Discuss your manufacturing project
Tell us what you need to build or the question you would like to discuss. Our team will help define the next step.
We can sign a non-disclosure agreement before discussing sensitive designs. Your project information and files are handled confidentially.