Electronics PDM workflow
Electronics change order ECO: control hardware changes before they reach production.
An ECO is not bureaucracy. For electronics teams, it is the difference between “we changed a resistor somewhere” and “this hardware revision, BOM, firmware build, and release package changed for a known reason.”
Direct answer: what an electronics ECO should control
An electronics ECO should record the change reason, affected product, hardware revision, schematic/PCB files, BOM lines, approved alternates, firmware impact, manufacturing impact, test impact, risk level, approvers, implementation date, and release package. If the change can affect fabrication, assembly, firmware, purchase, production, support, or customer units, it belongs in an ECO.
When does an electronics change need an ECO?
| Change | ECO needed? | Why |
|---|---|---|
| PCB layout change | Yes | Gerbers, assembly, testing, and mechanical fit may change. |
| Component MPN or footprint change | Yes | Purchase, assembly, firmware, and reliability may be affected. |
| Firmware pin map change | Yes | Hardware and firmware compatibility changes. |
| Approved alternate added | Usually | Production needs to know what substitute is allowed and why. |
| Silkscreen typo only | Maybe | Use ECO if it affects assembly, support, compliance, or customer-facing information. |
| Supplier price change | No engineering ECO | Track commercially unless the approved part or source strategy changes. |
Minimum ECO fields for electronics teams
Keep the ECO lightweight, but complete enough that a future engineer or production manager can understand the decision.
- ECO ID and title
- Product or project name
- Change reason: bug fix, cost reduction, shortage, reliability, customer request, production issue
- Affected hardware revision and new hardware revision
- Affected schematic, PCB, Gerber, BOM, firmware, and test files
- BOM lines changed and approved alternates
- Manufacturing, assembly, purchase, firmware, and support impact
- Risk level and validation required
- Approvers and approval date
- Release package and implementation status
Lightweight ECO workflow
Describe the problem, trigger, customer issue, shortage, or production failure.
List affected PCB revision, BOM, firmware, assembly, test, stock, and field units.
Engineering, purchase, production, quality, or founder approval depends on risk.
Freeze updated Gerbers, BOM, firmware, notes, and test steps under a new release.
Who should approve an ECO?
Approval should match the risk. A prototype resistor value change may need only engineering approval. A production regulator substitution may need engineering, purchase, production, and quality approval.
| Role | Approves |
|---|---|
| Engineering | Schematic, PCB, firmware, test, and technical risk. |
| Purchase | Supplier, MPN, availability, cost, and alternate sourcing. |
| Production / EMS | Assembly feasibility, process change, fixture, and line impact. |
| Quality / Support | Field impact, repair history, validation, and customer risk. |
| Founder / product owner | Customer commitments, schedule, cost, and business risk. |
When ECOs need Electronics PDM
A spreadsheet ECO log works for a few changes. It starts breaking when ECOs must connect to real PCB files, BOM lines, firmware builds, approvals, release packages, and production history.
Electronics PDM turns ECOs into traceable product history.
PCBVault Electronics PDM is being planned to manage ECOs across PCB revisions, BOMs, components, firmware links, approvals, release packages, and audit trail.
FAQ
What is an electronics ECO?
An ECO is a controlled record of a hardware, BOM, firmware, manufacturing, or test change and its approval and release impact.
Do small teams need ECOs?
Yes, once products move beyond one-off prototypes. A lightweight ECO prevents memory-based changes from becoming production mistakes.
Is an ECO the same as a new PCB revision?
No. An ECO is the change record. A new PCB revision may be the result of that ECO.
What is the biggest ECO mistake?
The biggest mistake is changing a part, PCB, or firmware build without recording why it changed and which release package uses it.