What is a covering array?
A covering array is a generalization of an orthogonal array. A covering array has the property that pairs of elements in the same row and from different columns occur at least once in the array. Basing test designs on covering arrays can lead to fewer test cases than some orthogonal array designs. The Testcover.com service uses proprietary technologies to generate test cases based on covering arrays. How many test cases should I get? That is a complicated question. Of course you want the fewest test cases possible. And you know that there can be no fewer test cases than the product of the numbers of values for the two largest factors. (For example, a test area with 1 factor with 6 values, 1 factor with 5 values, and 7 factors with 3 values must have at least 6 5 = 30 test cases.) But as the number of factors increases, this minimum number of test cases is not always possible. Examples on our Performance page illustrate this point. There are many ways to find arrays, and the different m
