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Bugs related to the interaction of more parameters decrease with the number of parameters; in other words, finding these rare bugs will require much more tests to be performed, leading to more time/costs. However, those rare t-way interaction faults can also be critical.

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Testing considering 2-way (pairwise) and t-way

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interaction of parameters

Given the empyrical data mentioned earlier, adopting pairwise algorithms to test all the combinations of pairs of parameters (sometimes also called as "all-pairs testing") is a technique that is not only feasible but also provides great results in terms of fault-detection.

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