QATestLab 21, Garmatna str., Kiev, Ukraine ph.: +38(044)277-66-61 http://qatestlab.com/ firstname.lastname@example.org
Test efficacy is the characteristic of the bugfinding capacity of the tests. To make a long story short, test efficacy estimates how good and productive the software tests were.
So efficacy is the ratio of the measure of bugs found during software testing to the total bugs found. Test efficacy = (Software bugs found during testing / Total bugs found)*100 Total bugs are the sum of new software bugs found by the user plus the bugs found in the test. Total bugs found = Bugs found during testing + New software bugs found by user
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