Orthogonal Array Testing. Orthogonal arrays oa are two dimensional arrays i e factors levels by choosing any two columns in the array provides even distribution of all the pair wise combinations. The two most popular software test design methods are orthogonal array testing and pairwise testing.
Orthogonal array testing is a black box testing technique that is a systematic statistical way of software testing. This article describes how these two approaches are similar but different and suggests that in most cases pairwise testing is preferable. It is used when the number of inputs to the system is relatively small but too large to allow for exhaustive testing of every possible input to the systems.
It is done by deriving small sets of test cases from a large number of scenarios and also by giving precedence to factors and levels that appear multiple times in the combinatorial outputs.
The required number of runs is therefore 3 l 3 levels 6 each level of each parameter tested 6 times 18 required runs for this orthogonal array. What is orthogonal array testing oats. Orthogonal array testing is a black box testing technique which is a systematic statistical way of software testing. Orthogonal array testing is a systematical and statistical way of testing pair wise interactions.
