Coming to the crux - OEMs who have active, deployed systems have the following set of advantages:
QAP/BoM frozen and certified (there should be no doubts regarding this aspect). Low failure rate; issues are usually doctrinal fit. Proven performance specs (Field Evaluation). A mature system that is already deployed/in service stands ready on a gargantuan pile of paperwork and real world deployment data. Hence, the ease for them when it comes to immediate procurement requirements.
QAP/BoM frozen and certified (there should be no doubts regarding this aspect). Low failure rate; issues are usually doctrinal fit. Proven performance specs (Field Evaluation). A mature system that is already deployed/in service stands ready on a gargantuan pile of paperwork and real world deployment data. Hence, the ease for them when it comes to immediate procurement requirements.

















