From BOM to Finished Product Under One Roof
Global Precision Works (GPW) integrates mechanical structures, electrical components, cabling, firmware, and testing into a single production program — delivering fully assembled, tested products ready to ship from Monterrey to your dock.
Your product is more than a circuit board. It is a chassis with mounted PCBAs, routed cables, installed connectors, loaded firmware, and validated test results. Box build assembly is the service that brings all of those elements together. GPW manages the full scope — mechanical, electrical, cabling, and testing — on one production floor, under one quality system, with one program manager accountable for every unit.
Why GPW for Box Build
Assembly-first focus. Dedicated program managers. 5 integrated quality gates. 2-3 week first article builds. One facility, one quality system, one team accountable from BOM to finished product.
What Is Box Build Assembly?
Box build assembly is the process of integrating mechanical, electrical, and electromechanical components into a finished enclosure or housing. It takes individual parts — PCBAs, connectors, power supplies, fans, cables, brackets, and fasteners — and builds them into a complete product that is tested, labeled, and ready for shipment.
A telecom equipment OEM needs a finished cabinet assembled from a sheet metal enclosure, 3 PCBAs, a power supply, 12 cable harnesses, and 40+ connectors. GPW mounts the boards, routes the cables, installs the power supply, loads firmware, runs a 47-point functional test, applies labels, and ships a finished unit — packaged and palletized to the customer's specifications.
Why This Matters for OEMs
Box build consolidates what would otherwise require 3-4 separate suppliers — a mechanical assembler, a cable shop, a test house, and a packaging provider — into a single program. One purchase order. One accountability chain. One quality system from receiving dock to shipping dock.
When those 3-4 suppliers are coordinated separately, every handoff introduces risk: damaged components in transit, miscommunication on revision levels, finger-pointing when a unit fails at the customer's dock. A single-source box build program eliminates those handoffs. GPW receives your components, assembles the product, tests it, packages it, and ships it — with one team responsible for the result.
How Does GPW Execute a Box Build Program?
Every box build program at GPW follows a structured, repeatable process. Every step is documented, every station is configured for the specific product, and every quality gate is defined before the first unit enters the line.
Program Launch & DFM Review
GPW's engineering team performs a full design-for-manufacturing (DFM) review before quoting. This review evaluates assembly sequence optimization, component accessibility, cable routing feasibility, test point locations, and potential risks.
The DFM review produces a detailed process plan: step-by-step assembly instructions, station assignments, fixture requirements, tool lists, and quality gate definitions. If GPW's engineers identify design improvements that reduce assembly time or improve reliability, those recommendations go back to the customer before production begins.
A production-ready process plan with no ambiguity about how each unit will be built.
First Article Build & Validation
Before volume production begins, GPW builds and validates first article units. The first article build follows the process plan exactly — no shortcuts, no workarounds. This build validates assembly sequence, fixture fit, cable routing paths, test protocol execution, and cycle time targets.
The first article build is where assumptions become facts. Estimated cycle times become measured cycle times. Cable routing paths that looked feasible on paper are validated physically. Test protocols are executed against real hardware, not simulations.
A validated build process with documented cycle times and a first article inspection (FAI) report.
Production Assembly
Production assembly follows the validated process plan across dedicated workstations. Each station handles a defined scope — mechanical mounting, electrical integration, cable routing, or sub-assembly preparation. Operators work from visual work instructions displayed at the station, with each step requiring sign-off before the unit moves forward.
GPW manages component flow through a controlled material system. BOM-level traceability tracks every component from receiving through final shipment — including lot numbers, date codes, and supplier certifications.
Assembled units that match the validated process plan, with full component traceability.
Testing, Inspection & Quality Gates
Testing at GPW is not a single end-of-line checkpoint. GPW integrates quality gates throughout the assembly process:
Every shipped unit has a documented test record proving it meets specification.
Packaging, Labeling & Shipment
The last step covers final cosmetic inspection, customer-specified labeling (barcodes, serial numbers, regulatory marks), and packaging. GPW packages products to customer specifications — including custom foam inserts, anti-static packaging, palletization patterns, and shipping documentation.
For programs requiring direct-to-customer shipment, GPW coordinates logistics from the Monterrey facility to U.S. destinations. USMCA-compliant documentation ensures duty-free entry into the U.S. for qualifying products.
Finished products arrive at your dock ready for distribution — no repackaging, no relabeling, no additional handling.
Your BOM. Our Production Floor.
One Finished Product.
Submit your bill of materials and specifications — GPW's engineering team will respond with a detailed technical review and quote within 24 hours.
Request a Quote Request a QuoteWhich Industries Rely on Box Build Assembly?
Box build assembly serves every industry where a finished product requires mechanical, electrical, and cabling integration. GPW builds box-level assemblies across 8 verticals.
Techniques GPW refines in aerospace traceability improve the documentation quality of medical device builds. Cable management practices developed for telecom cabinet assembly transfer directly to AI server rack integration. Every industry makes GPW better at box build for every other industry.
What Does GPW's Box Build Capability Include?
- From single-board enclosures to multi-PCBA systems with 500+ components
- Pilot builds of 10 units through 10,000+ units/month sustained production
- First article builds in 2-3 weeks from process plan approval
- Production ramp in 4-6 weeks
- Mechanical: Chassis mounting, bracket installation, structural fastening
- Electrical: PCBA mounting, connector integration, power supply installation
- Cabling: Internal cable routing, harness installation, cable management
- Firmware: Loading, configuration, initialization, verification
- Testing: Functional test, burn-in, Hi-Pot, continuity, visual inspection
- Monterrey, Mexico — 150 miles from Texas
- Same timezone as Central U.S.
- Direct flights from Austin, Dallas, Houston, Phoenix, San Jose
- 40-60% cost savings vs. domestic U.S. assembly
- USMCA-compliant, duty-free shipping into the U.S.
Box build is not an add-on service at GPW — it is the core discipline. Every engineering resource, quality system, and facility investment is optimized around assembling complex electromechanical products to specification.
GPW vs. Typical EMS Approach
| Aspect | Typical EMS Provider | GPW |
|---|---|---|
| Core focus | PCBA fabrication + assembly add-on | Assembly-first — box build is the core service |
| Quoting process | Sales-driven rough estimates | Engineering-driven DFM review before quoting |
| Program management | Shared across multiple programs | Dedicated program manager per customer |
| Testing integration | Separate test department | Testing integrated into the production line |
| Cable routing | Subcontracted or secondary skill | In-house cable harness assembly team |
| NPI speed | 6-10 weeks typical | 2-3 weeks first article, 4-6 weeks ramp |
The difference comes down to focus. A PCBA-centric EMS provider dedicates its engineering resources to SMT line optimization and board-level yield improvement. Box build gets the remaining capacity. At GPW, box build is the primary discipline. The engineering team, the facility layout, the quality systems, and the equipment investments are all optimized around one thing: assembling complex electromechanical products to specification.
Box Build
Assembly FAQ
Box build assembly is the integration of mechanical, electrical, and electromechanical components into a finished enclosure or housing. It includes component mounting, cable routing, connector wiring, firmware loading, functional testing, and final packaging. GPW manages the complete box build scope on one production floor in Monterrey.
GPW's typical timeline runs 2-3 weeks for first article builds after process plan approval, followed by a 4-6 week production ramp. Complex programs with custom fixtures or specialized testing may require additional NPI time. Engineering provides a detailed timeline as part of every RFQ response.
Every quote includes DFM review, process planning, first article build and validation, production assembly, integrated testing, packaging, and full component traceability. GPW quotes on a per-unit basis with transparent line-item breakdowns covering labor, materials handling, testing, and packaging -- so you know exactly what each cost element covers.
Yes. GPW's production floor supports programs ranging from pilot builds of 10 units to sustained production runs exceeding 10,000 units per month. The same documented processes, quality gates, and traceability systems apply regardless of volume.
Every build follows documented workmanship and inspection standards, with first-article inspection, in-process checks, and full traceability. We align to the quality, documentation, and inspection requirements each customer program defines.
GPW integrates quality into the production line through multiple gates: incoming component inspection, in-process visual and continuity checks, end-of-line functional testing, burn-in validation (when required), and final cosmetic inspection. Every unit carries a documented test record tied to its serial number.
GPW provides box build assembly across 8 industries: AI and server rack hardware, industrial equipment, telecommunications, medical devices, automotive, energy, aerospace, and appliances. Each vertical has dedicated assembly procedures and compliance protocols tailored to its regulatory requirements.
Start Your Box Build Program
Whether you have a complete BOM ready for quoting or a concept that needs assembly planning support, GPW's engineering team is ready to review your project. Submit your specifications and receive a detailed DFM analysis and proposal within 24 hours.
Request a Quote Request a QuoteNo commitment. No minimum order. Engineering-driven quoting — not a generic sales estimate.