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#Stage plot pro add numbers series

Data points: output values plotted on the chart.

Output: The data measurement from the completed process plotted on the vertical (Y) axis.

Time- series: the specific time period of the output (hours, days, weeks, months) plotted on the horizontal (X) axis.

Display outputs to look for stability or instability.

To identify process variation and avoid unbiased actions.

Effectively track and communicate improvements (and determine success).

To visually depict how the process is performing.

Minimum statistical knowledge is sufficient to draw and interpret the chart.

It does not require too many calculations or software’ for analysis.

Following are a few reasons to use a run chart Why use a run chartĪ run chart is to determine whether or not the central tendency of the process is changing. Pattern or trend indicates the presence of special cause variation in the process. You can turn a run chart into a control chart by adding upper and lower control limits. However, it will graphically depict how the process is running.

Since the run chart does not have control limits, it cannot detect out of control conditions. If the results fall within the control limits, then the process is stable otherwise, it suggests that the process is not stable.Ī run chart similar to a control chart, but the key difference is it can reveal shifts and trends, not the process stability. Typically control limits are defined as three standard deviations from the mean. On the control chart both upper and control limits are defined. In other words, measure any type of output variable over time and see the results consistently fall within the control limits. Difference between Run chart and control chartĬontrol charts are used to monitor the stability of the process. Usually, run charts are used in measure phase of DMAIC project and it helps to identify trends or shifts in process and allows testing for randomness in the process.

#Stage plot pro add numbers series

A run chart is also known as trend chart or time series plot.