According to this terminology a t-way fault is caused by combination of t of the input parameters and as you are saying that, if we consider up to 5-way fault then all possible bugs would have been discovered in a practical software and as experiment shows that a majority of the software faults consist of simple and pair-wise faults, even for a very large software, complex and large software if we consider pair-wise faults we would have got 80-90 percent of the problem identified and if you consider 3-way or 4-way we would have got almost every bug that is present and at a very reduce number of test cases.
ಈ ಪರಿಭಾಷೆಯ ಪ್ರಕಾರ ಟಿ-ವೇ ದೋಷವು ಇನ್ಪುಟ್ ನಿಯತಾಂಕಗಳ ಟಿ ಸಂಯೋಜನೆಯಿಂದ ಉಂಟಾಗುತ್ತದೆ ಮತ್ತು ನೀವು ಹೇಳುತ್ತಿರುವಂತೆ, ನಾವು 5-ದಾರಿ ದೋಷವನ್ನು ಪರಿಗಣಿಸಿದರೆ, ಸಂಭವನೀಯ ಎಲ್ಲಾ ದೋಷಗಳನ್ನು ಪ್ರಾಯೋಗಿಕ ಸಾಫ್ಟ್‌ವೇರ್‌ನಲ್ಲಿ ಮತ್ತು ಪ್ರಯೋಗವಾಗಿ ಕಂಡುಹಿಡಿಯಬಹುದಿತ್ತು.