"All pairs" is the approach to take. There is a good amount of quality writing on this; I suggest starting here: https://www.satisfice.com/download/pairwise-tes

"All pairs" is the approach to take. There is a good amount of quality writing on this; I suggest starting here: https://www.satisfice.com/download/pairwise-testing-a-best-practice-that-isnt https://www.satisfice.com/download/pairwise-testing-a-best-p...