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MethodologySix Sigma

Brainstorming

Brainstorming is a method for generating a large number of creative ideas in a short period of time. Brainstorming is full of energy, moves rapidly, and is synergistic, creating a large list of ideas which may eventually be boiled down, or funneled down, to a smaller list of priority items later in the project.

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MethodologySix Sigma

Histograms and Collected Data Sets

Histograms are used to show the distribution of a set of collected data.

Generic bar charts can be created for any type of categorical or numerical data. If the categories of the data plotted in a bar chart have no meaningful order, many different charts can be created by rearranging the order of the bars. Histograms, on the other hand, are used to show the pattern or the distribution of the data across the categories, so there must be only one correct pattern.

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MethodologySix Sigma

Cell Intervals: Impact on Shape

The choice of Cell Intervals (the number and width of the classes used to construct a histogram) can have an effect on the shape of the histogram. In general, a smaller number of intervals results in a less distinct shape, while a larger number of intervals can reveal unexpected patterns.
Note: Please refer to the other topic on cell intervals for more information about rules-of-thumb in regard to cell choices.

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