The Psychology of Quality and More

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There is more than one type of Z-Chart.

The first type is an unusual form of Control Chart which plots standard values (Z), allowing multiple processes to be plotted on the same chart.

Another type is a chart that forms a letter Z as it combines current, cumulative and moving total values for a given regular measurement. This is useful for showing progress in both the short and long term:

See also:

Line Graph, Control Chart

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