Why won you guarantee GeneChip results if I don run a test chip?
If Test array results fall within acceptable limits, there is a high probability that the GeneChip results will be successful. If the test chip results are poor, then it is unlikely the GeneChip results will be any better. GeneChips cost in excess of $250 each whereas a test chip is only $95. Users with a great deal of experience using the Affy GeneChip system and a historical record of positive results, may wish to waive using a test chip. If you choose to do so, we still cannot guarantee successful results on the GeneChip.