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Evaluate a larger set of options based on numerous criteria, then weight the importance of each criterion to derive the best choice.
Example of a grid analysis. In this example the products are similar and the features are likely to be featured on that product. There are some common features across the products and it is clear to see which products have more features and which have less and it is possible to do some weighing up of the importance of the features depending on your priorities.
Another example comparing WordPress form plugins