How to Interpret the Mean & Standard Deviation on a Control Chart. The extent to which products meet specifications needs to be systematically monitored in a production process. Product quality ...

Here is a quick overview for an understanding a standard deviation chart data set. You can see how the examples of the data will fall within one standard deviation of the mean for approximately 68% of ...

This paper proposes a heuristic method based on adjusted weighted standard deviation for constructing R chart for skewed process distributions. The asymmetric control limits of the chart are ...

This week’s Chart of the Week comes from Morningstar’s market strategist Lochlan Halloway’s earnings analysis. Our Fair Value ...