Siemens Adds ASTER to Connect PCB Design and Test Analytics

Siemens announced the acquisition of ASTER Technologies on January 13, 2026. The transaction adds design-for-test analysis to Siemens’ electronic systems design portfolio.

The practical objective is straightforward: identify test coverage limitations while a printed circuit board can still be changed at a relatively low cost.

The announcement is no longer new, but its engineering importance extends beyond Siemens’ portfolio expansion. PCB teams often manage design intent, manufacturing rules, inspection requirements, and electrical test data in separate tools. Siemens is working toward a more connected workflow across its Xpedition and Valor environments, with ASTER adding testability analysis to that broader process.

Design-for-test analysis can identify missing access and coverage constraints before a PCB reaches production.

What ASTER Technologies Adds

ASTER develops software for analyzing the testability of printed circuit board assemblies. Its analysis can estimate whether available inspection and electrical test methods can detect faults across the design.

The assessment may identify components, nets, or circuit areas with limited test access. It can also expose conflicts between the PCB layout and the planned test process.

This type of analysis does not prove that a completed board will operate correctly. Coverage calculations depend on the quality of the design data, component information, netlist, layout, test library, and production equipment model.

A coverage result indicates whether a defined test process is expected to detect a defined fault condition. Physical validation remains necessary during prototype and production testing.

Why Design-for-Test Analysis Should Start Earlier

A missing test point is usually easier to correct during schematic or layout review. The same issue becomes more expensive after routing, fixture design, enclosure approval, and manufacturing release.

Late changes may require a board revision, a new test fixture, an alternative inspection method, or additional manual checks. Some teams may instead accept lower coverage because the redesign cost is too high.

Early analysis gives engineers a measurable design trade-off. A test pad requires board space and may affect routing or signal integrity. Removing the pad can reduce access for in-circuit or boundary-related testing.

The benefit of design-for-test analysis is not simply adding more test points. It is showing the consequences of a layout decision before the prototype reveals the problem.

How Xpedition, Valor, and Test Analysis Can Work Together

Siemens Xpedition supports PCB system design and layout. Siemens Valor products support manufacturing preparation and design-for-manufacturing analysis. ASTER adds another evidence layer by evaluating whether the planned inspection and test strategy can provide sufficient coverage.

A connected workflow could allow design data to move into testability analysis. The resulting findings could then return to layout and manufacturing teams for review.

The workflow may also preserve decisions made during design review. This record can help engineers understand why a test point was added, removed, or replaced by another inspection method.

Production results can provide additional value when they are compared with earlier coverage predictions. If a predicted test opportunity repeatedly fails in production, the engineering team can review the model, fixture, process, or component data.

The exact level of integration will depend on Siemens’ product roadmap, supported data formats, and customer implementation. The engineering value will come from traceability across revisions, not from simply adding another software interface.

For related industrial hardware categories, PLC ProTech’s Siemens collection provides a vendor catalog path. The drive boards collection also covers industrial PCB assemblies that may require long-term replacement and lifecycle planning.

Applications in Industrial Electronics

Industrial control boards often remain in service for many years. Their production volumes may be lower than consumer products, but a field failure can stop a machine, production line, or process unit.

Improved test planning can support several industrial assemblies, including:

• Variable-frequency drive control boards
• PLC and PAC controller modules
• Industrial communication cards
• Safety-related electronic assemblies
• Power conversion and protection boards
• Legacy control system replacement parts

High-mix production creates an additional challenge. A component substitution, routing change, or board variant can alter test access and fault coverage.

For this reason, design-for-test analysis should follow configuration control. The design revision, bill of materials, manufacturing process, inspection plan, and test program must remain aligned.

Why Coverage Results Need Engineering Review

A high coverage percentage does not automatically indicate a complete test strategy. Engineers must understand which faults are included, which test methods are assumed, and which areas remain untested.

Coverage analysis should therefore be reviewed together with:

• Component and netlist accuracy
• Test-point accessibility
• Fixture and probe limitations
• Inspection equipment capability
• Boundary conditions and fault assumptions
• Board variants and approved substitutions

Engineers should also distinguish between predicted coverage and production evidence. A model may identify an available test opportunity, but the factory still needs to confirm repeatability, contact quality, programming, calibration, and process control.

The Broader Direction of Electronic Design Automation

Electronic design automation vendors are expanding beyond schematic capture and PCB layout. Manufacturing analytics, inspection planning, test engineering, and lifecycle data are becoming part of the same discussion.

Earlier analysis can reduce late engineering changes and improve communication between design, manufacturing, quality, and service teams. However, software integration alone does not remove organizational or data-quality problems.

Standards-based data exchange and open interfaces will remain important. Manufacturers rarely use one vendor for every design, inspection, and test activity.

A useful platform must preserve traceability across mixed equipment. It should also explain how a coverage result was calculated and which design revision produced it.

Editorial View

The strongest case for Siemens’ acquisition of ASTER Technologies is not faster PCB layout by itself. It is earlier evidence about what a factory can inspect and test.

That evidence can influence component selection, test-point placement, fixture planning, inspection strategy, and production release decisions.

Siemens will need to demonstrate that coverage analysis remains synchronized with design revisions and that production results can improve future decisions.

If that feedback loop works, test engineering becomes a design input rather than a late manufacturing checkpoint.

Questions Engineers Ask

Does design-for-test analysis prove that a PCB will work?

No. It estimates whether defined inspection and electrical test methods can detect specified fault conditions. Physical validation remains necessary.

Why should test coverage be checked before layout is complete?

Early changes are usually less expensive. Late changes may affect routing, fixtures, enclosure constraints, manufacturing release, and delivery schedules.

Can a high coverage percentage guarantee product quality?

No. Coverage depends on the tested fault model, data accuracy, equipment capability, fixture condition, and production execution.

Why are board variants important?

A component substitution or layout revision can change test access and coverage. Each approved variant should remain linked to its own design and test data.

What should manufacturers verify after the analysis?

They should verify test-point access, fixture repeatability, inspection capability, program configuration, calibration, and production results.

Conclusion

The Siemens–ASTER transaction reflects a wider shift in PCB engineering. Testability is moving closer to the design stage, where engineers can still change the board without major production disruption.

For industrial electronics, this approach can support better lifecycle control and more repeatable verification. Its success will depend on accurate data, clear revision management, practical factory validation, and useful integration between design and manufacturing teams.