ICT, FCT, or Flying Probe? Choosing a PCBA Test Strategy Before Pilot Run
·9 min read·PCBA PARTNER Test Engineering
Test strategy should be designed before pilot run, not after defects appear. The right choice depends on product maturity, quantity, fault coverage needs, and how much traceability the customer expects from each shipped unit.
Flying probe is flexible and avoids fixture cost, making it useful for prototypes and pilot and low-volume PCBA builds. It is slower than ICT but can catch many opens, shorts, and component-value issues when the design is still changing.
ICT for stable repeat production
ICT is powerful when nets are accessible and volume justifies fixture investment. It can improve throughput and repeatability, but layout must include test points and stable fixture assumptions early.
FCT for product behavior
Power-up sequence and current draw
Communication, sensor, relay, or motor-control behavior
Programming, calibration, and serial-number logging
Customer-specific pass/fail report format
Coverage is a business decision
Testing every possible condition can make cost and cycle time unworkable. Define high-risk failures, field consequences, and production quantity first, then choose the coverage level that fits the program.
Before requesting a quote
Share the schematic, test-point constraints, firmware access method, required fixtures, and expected log format. These details help PCBA PARTNER quote test NRE and unit test time more accurately.
