何当奇
第16楼2006/12/11
接触限值 exposure limit, 跟 action limit 不是一个范畴的东西,
action limit (QM)
Quality Management (QM)
The limit represented by the highest or lowest value in a quality control chart.
If the actual values fall outside these limits, a correction in the process is required and/or the cause of the change in the process must be determined.
Action limit, see control limit.
Control limit: a specified boundary on a control chart that, if exceeded, indicates a process is out of statistical control, and the process must be stopped, and corrective action taken before proceeding (e.g., for a Shewhart- chart the control limits are the mean plus and minus three standard deviations, i.e., the 99.72% confidence level on either side of the central line.) (USEPA)
何当奇
第20楼2006/12/12