Glossary

Design review

A design review is a formal, scheduled examination of a design by stakeholders who did not create it, held to find defects before they become expensive. In hardware, reviews typically cover the schematic, the PCB layout, mechanical fit, and manufacturability — each a checkpoint the design must pass, with findings tracked to closure, before the design is allowed to proceed.

In one sentence

The design review is the cheapest defect-removal tool hardware has — not because reviewers are smarter than designers, but because a fresh set of eyes sees what familiarity hides.

How it works in practice

Hardware teams typically run several reviews across a program, each with a different lens: schematic review (netlist correctness, component selection and derating, power budgets, signal-integrity risks, firmware-hardware interface assumptions), layout review (stackup, placement, routing, grounding, thermal paths), mechanical / fit review (enclosure clearance, connector placement, tolerance stack-ups), and manufacturability review (DFM/DFT) (can the fab build this panel? can the test fixture probe these nets?).

Example: at schematic review for a motor controller, a reviewer notices the gate-driver’s bootstrap capacitor is sized for the typical switching frequency but the firmware team plans to run 40% faster — a cross-discipline catch neither team would have found alone. The action item: resize the capacitor and re-run the thermal analysis. Cost of the catch: one meeting. Cost of missing it: field failures.

Common failure modes

Rubber-stamp reviews. The review is scheduled because the process requires it, the designer’s manager runs it, and everyone approves because pushing back feels political. Findings are social, not technical.

Reviewing a stale revision. The review package goes out on Monday; by Wednesday’s meeting the designer has “fixed a few things.” The team reviews rev B while rev C is already in flight, and the findings apply to a design that no longer exists.

Action items without closure. Findings are captured in meeting notes or email and never tracked. The same issue resurfaces two spins later, and nobody remembers it was already found once.

The wrong people in the room. A schematic review with no firmware engineer misses interface assumptions; a layout review with no manufacturing engineer misses DFM issues. Reviews fail when they’re discipline-siloed — which is most of the time.

Reviews that don’t scale. At small team sizes, reviews happen organically — the senior EE glances at every schematic. As the team grows, that informal coverage collapses: more designs, more disciplines, more interfaces, and the review process never got formalized to match.

How ProductFlo handles it

ProductFlo doesn’t replace design reviews — judgment about architecture and trade-offs is exactly what humans are for. It removes the archaeology that makes reviews slow and shallow. Agents do the cross-discipline checking on every change — BOM validation, pin-map validation, clash detection — so the human review is fast, focused, and backed by evidence instead of memory. Contextual markup stays attached to the design, not lost in email or chat threads, and every change leaves an audit-logged trail. The review stays human; the homework gets automated. Agents propose diffs. Humans approve.

Questions about design reviews

What happens in a hardware design review?+
Reviewers — stakeholders who did not create the design — examine the schematic, PCB layout, mechanical fit, and manufacturability against checklists, record findings as action items with owners, and the design doesn’t proceed until they’re closed. A review whose findings evaporate into email was a meeting, not a review.
When should a hardware team hold design reviews?+
At every stage gate: schematic review before layout, layout review before fab, mechanical/fit review before tooling, manufacturability review (DFM/DFT) before release. The cost of a defect grows with every stage it survives — a wrong footprint caught in schematic review costs an hour; caught after production, a recall.
Why do design reviews fail?+
The classic failure modes: rubber-stamp reviews where pushing back feels political; reviewing a stale revision while the designer has already moved on; action items captured in meeting notes and never tracked; the wrong people in the room (a schematic review with no firmware engineer misses interface assumptions); and reviews that never got formalized as the team grew.
How does ProductFlo change design reviews?+
ProductFlo doesn’t replace design reviews — judgment about architecture and trade-offs is exactly what humans are for. It removes the archaeology that makes reviews slow and shallow: agents do the cross-discipline checking on every change (BOM validation, pin-map validation, clash detection), contextual markup stays attached to the design, and every change leaves an audit-logged trail. The review stays human; the homework gets automated. Agents propose diffs. Humans approve.

Related concept

The merge gate →

The enforcement point: no hardware change ships until every affected discipline is checked and a human approves.

Related concept

ECO →

Review findings that change the design become ECOs — the formal vehicle for released changes.

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