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The prototype run is a critical part of the project path, and any time spent by R&D resources diagnosing manufacturing faults is generally considered time wasted. The expectation is that boards coming into the R&D department from the manufacturing centre will power up smoothly and start functioning, allowing the engineers to continue performance validation and software testing.
In general, prototypes are built on the same or similar lines to those used for volume production and components that are used on existing production boards will be used to assemble prototypes. However, there are some distinct differences between the demands for prototype testing and volume manufacturing test.
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