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Table 1 The rate of problems based on their severity

From: A combination of two methods for evaluating the usability of a hospital information system

0No problemNo usability problem;
1CosmeticNo need to be fixed unless extra time is available on the project;
2MinorFixation should be given low priority;
3MajorImportant to fix thus it should be given high priority;
4CatastropheImperative to fix before releasing the product