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Then the answer to the central question of this guide is on the Analysis screen.
Comparison & Conclusions
Remember the dangers of manual selection without the systematic approach? The “good enough” existing suite only covers 48% of 2-way interactions in the system, leaving a significant number of potentially-defect-causing gaps in coverage.
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What if you let Test Case Designer select all the non-specified values for the 8 business rules that you had? As you go to the Analysis tab in that copied model, this is what you should notice:
Note: we recommend opening the models in 2 different browser tabs so that you can easily go back and forth.
Test Case Designer is able to scientifically detect the optimal way to select values for each test scenario and generate 26% more interaction coverage with the same number of tests. Consequently, you hit the diminishing returns on coverage a lot sooner and your total suite size is smaller (17 in this case).
This is the process to prove the objectively-superior nature of the TCD-selected tests. Did your results come out drastically different than the above ones? Please feel free to reach out to us and share your experience or ask for advice on putting together this comparison yourself.
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