In the medical field, both accuracy and precision are essential in order to ensure that results are valid. When one is not able to achieve either accuracy or precision requirements then a device is bound to fail tests or further calibration. These are among many reasons when a device or any drug are recalled or discontinued. The U.S. Food and Drug Administration has set a high standard regarding accuracy and precision to ensure that calibrated equipment meets certain requirements. Some errors for not meeting this accuracy and precision limits are a personal human error, method error or instrumental error. When these limits are not met, then they are re-evaluated and recalibrated to bring the potential results.