【题目】A Case study for control charting a product quality measure that is a continous founction over time
【作者】Brill,R.V.
【年份 卷 期刊】the 45th Annual Fall Technical Conference ,Toroto,Ontario.

【题目】 An EWMA for monitoring a process standard deviation
【作者】Crowder,S.V., and Hamilton,M.D.
【卷 期刊 页码】Journal of quality Technology 24,pp. 12-21