In order to prevent crack due to overheat, the upset forging temperature is set equal to or lower than the temperature specified in the notice (Doc.No: NVQA-050209) issued by QA Dept. The temperature is directly monitored (not calculated by the current value) but even if it is out of standard (or if it reaches to the lower limit), there is no system in place to stop the machine or discharge NG work. NG work might be delivered to the next process unless the operator finds it.