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100-Metodos-de-Qualidade-Total

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186 <strong>100</strong> METHODS FOR TOTAL QUALITY MANAGEMENT<br />

Method 81<br />

Matrix data analysis<br />

Purpose<br />

To provi<strong>de</strong> a picture of numerical data from a matrix diagram In an<br />

efficient way.<br />

When to use<br />

It can be used to obtain a picture of, for example, different products and<br />

market characteristics. It is an important means of analysing multi-variate<br />

data.<br />

How to use<br />

Its use is equivalent to principal component analysis which is a method of<br />

multi-variate statistical analysis. It requires some knowledge of statistical<br />

methods beyond the scope of this book.<br />

Stomach upset<br />

+<br />

• Brand 1<br />

+<br />

--------<br />

Effectiveness<br />

Brand 4 •<br />

• Brand 2<br />

• Brand 6<br />

• Brand 3<br />

Brand 5 .<br />

Figure 1<br />

Matrix data analysis

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