Why PCB design reviews are critical before manufacturing
Hardware is unforgiving. A software bug can be patched and deployed in minutes. A design error discovered after PCB fabrication means weeks of delay and thousands of dollars in wasted material, assembly, and engineering time - before you even consider the market timing impact.
A PCB design review is a structured, expert evaluation of your hardware before fabrication. It's the highest-ROI quality gate in hardware development - because the cost of fixing a mistake scales exponentially once you move from design files to physical boards.
The real cost of skipping a review
A board respin at prototype stage typically costs between $3,000 and $15,000 when you account for bare board fabrication, assembly, component procurement, and engineering time. For a hardware startup, a six-to-eight-week respin delay can mean missing a product launch, a funding milestone, or a customer pilot.
A professional PCB design review costs a fraction of a single respin - and catches the issues that cause them.
What our PCB design review covers
Our review is not a checklist tool or automated DRC pass. It's a human expert evaluation that applies real engineering judgment to your specific design, in context.
Design principles and circuit correctness
We verify that the design approach is fundamentally sound - power domains defined correctly, communication interfaces connected consistently with protocol requirements, and no fundamental electrical mistakes in the circuit topology.
Connections, nets, and annotation
Unconnected pins, missing pull-ups, inverted logic signals, and incorrect net assignments are common schematic errors that ERC doesn't catch. We verify net completeness and logical correctness across the entire design.
Footprints and symbols
Mismatches between schematic symbols and physical footprints - wrong pin count, incorrect pad sizing, swapped signal assignments - produce boards that fail to assemble or function. We cross-reference symbols against component datasheets.
Signal integrity and high-speed routing
For designs with high-speed interfaces - USB, Ethernet, DDR, SPI above 10MHz - trace impedance and routing geometry directly determine whether data is reliably received. We review controlled-impedance traces, differential pair routing, length matching, and via placement on high-frequency nets.
Antenna matching and RF layout
RF layout is unforgiving. Transmission line geometry, matching network placement, ground plane cutout beneath the antenna, and clearance from noise sources all affect RF performance significantly. We review RF designs - discrete antennas, modules, and RF ICs - for compliance with integration guidelines and RF best practices.
Component selection and alternatives
We flag over-specified components (unnecessary cost), under-rated components (risk), and single-source parts (supply chain vulnerability). Where relevant, we identify pin-compatible second-source alternatives.
PCB stack-up and technology
Stack-up selection has direct implications for signal integrity, power distribution, and EMI. We verify that signal layers are referenced to adjacent ground planes, that dielectric and trace geometry support impedance targets, and that the stack-up is appropriate for the design's frequency content.
Pinout validation
MCU and FPGA pin assignments are verified against datasheet requirements - power pins, special-function pins, peripheral mapping, and IO drive capability. Wrong pinout assignments are responsible for a significant share of first-spin failures.
Thermal behaviour
Thermal failure modes are insidious - intermittent, worsening with age, appearing only under specific conditions. We verify exposed-pad implementation, via array sizing for heat transfer, copper pour area for power dissipation, and whether the thermal design matches the expected operating environment.
Return paths and grounding
The single most common cause of EMI problems in PCB design is poor return current management. When a plane has a slot or split beneath a signal trace, return current takes a longer, higher-inductance path - creating a loop antenna. We systematically analyse return paths for all high-frequency and high-current nets.
Cost optimisation at layout level
Via size minimums, clearance tightness, and board dimensions all affect fabrication cost without functional benefit. We flag opportunities to reduce manufacturing cost through straightforward layout changes.
Common PCB design mistakes
These are the most frequent categories of issues our hardware design review service identifies - across schematics, layouts, and BOMs, across all experience levels.