Page 424 - Six Sigma Demystified

404 Six SigMa DemystifieD

Work Breakdown Structure

Excel

Using Green Belt XL Add-On
Open a new file in the MindGenius application.
Enter the problem/project statement as the map title in the initial dialog. Use
the “OK” button to start the new branch.

With this main branch selected, simply type each category description into the
Add Branch dialog, and then select the “OK” button to place the category into
the Map Editor (drawing surface).
Select a given category, and then type in a subcategory associated with that
item.

An example of a work breakdown structure used to isolate potential project
issues was shown in Chapter 4.

Interpretation

The output of the WBS will provide input into other tools, generally data-col-
lection tools such as the Pareto diagram. After breaking down the elements of
the purchase order process into the different types of products ordered, we
then would want to consider which of these types are in most critical need of
improvement.

X-bar Charts

An X-bar chart, or X chart, is a control chart that is useful for variables data.
The X-bar chart monitors the process location over time based on the average
of a collection of observations called a subgroup.
X-bar charts are used with an accompanying chart for monitoring variation
between observations in the subgroup over time—either the range chart or the
sigma chart.