The automotive industry works with so-called samples (A,B,C,D), providing components under development as prototypes with increasing functionality and integrating them in test vehicles. The sample phases are defined as follows (for details see section 2.2.2):

A-Sample:     functional prototypes, usually with limited drivability and low degree of maturity

B-Sample:     functional, basic prototypes with full drivability and a high level of maturity. They may be created using pilot tools.

C-Sample:     fully functional sample manufactured with series production tools

D-Sample:     same as C-Sample, provided by suppliers for the purpose of the design sample release


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