First stage of the PCB, proof of concept. Focused on functionality and demonstrable product. Board bring up and debug straight off the assembly line.
Fix the first issues identified in Prototyping stage. Additional features check. Expand areas of test.
Expanded test procedures to include reliability testing at temperatures to accelerate life time testing Pilot Functional Testing.
Once production has been approved product starts to ramp up Test jig is fully developed and ready for volume production.
Failure analysis is an ongoing process throughout which ensures continuous improvements and yield.