Browsing All posts tagged under »Quality«

Control Chart

February 17, 2009 by

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The Control Chart is a type of run chart that shows whether a process is in statistical control by adding lines called Control Limits to the chart. There is both an Upper Control Limit and a Lower Control Limit. It is also common to add a line representing the mean (average), and sometimes lines representing […]

Run Chart

February 16, 2009 by

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The tool of Run Charts are a way to graphically illustrate a set of data. The passing of time is usually graphed on the x-axis. Time could be measured in any increment—seconds, days, months, decades, etc. The measure of interest is graphed on the y-axis. Run Charts are especially useful for showing any trends over […]

Scatter Diagram

February 10, 2009 by

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The Scatter Diagram (also called Scatter Plot) graphically illustrates data from two variables. It is listed as a tool and technique of the fourth edition PMBOK®’s Perform Quality Control process. One of the two variables is on the x-axis, and the other variable is portrayed on the y-axis. In this fictional example, 17 people were […]

Pareto Chart

February 9, 2009 by

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The Pareto Chart (also called Pareto Diagram) is used to show the various causes of defects. It is listed as a tool and technique of the fourth edition PMBOK®’s Perform Quality Control process. The purpose of the Pareto Chart is to identify the biggest problems affecting quality so that those causes may be targeted for […]