Moving Average Monitoring Charts for Individual Measurements

Moving Average Monitoring Charts for Individual Measurements [Pg.19]

Three approaches can be used for estimating S for individual measurements [Pg.19]

If a rational Mocking of data exists, compute an estimate of S based on it. It is advisable to compare this estimate with the estimates obtained by using the other methods to check for discrepancies. [Pg.20]

The overall S estimate. Use all the data together to calculate an overall standard deviation. This estimate of S will be inflated by the between-sample variation. Thus, it is an upper bound for S. If there are changes in process level, compute S for each segment separately, then combine them by using [Pg.20]

Process Level Monitoring by Moving Average (MA) Charts [Pg.20]

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