Test Efficiency Vs Test Effectiveness

Test Efficiency:
a. Test efficiency = Internal in the organization how much resources were consumed, how much of these resources were utilized.
b. Number of test cases executed divided by unit of time (generally per hour).
c. Test efficiency = (Total number of defects found in unit + integration + system) / (Total number of defects found in unit + integration + system + User acceptance testing)
d. Test Efficiency: Test the amount of code and testing resources required by a program to perform a function.
e. Testing Efficiency = (No. of defects Resolved / Total No. of Defects Submitted) * 100.
f. Test Efficiency is the rate of bugs found by the tester to the total bugs found.

When the build is sent to the customer side people for the testing (Alpha and Beta Testing), the customer side people also find some bugs.

Test Efficiency = A/(A+B)
Here A= Number of bugs found by the tester
B= Number of bugs found by the customer side people
This test efficiency should always be greater than 90%

Test Effectiveness:
a. Test effectiveness = How much the customer's requirements are satisfied by the system, how well the customer specifications are achieved by the system, how much effort is put in developing the system.
b. Number of defects found divided by number of test cases executed.
c. Test effectiveness = (Total number of defects injected + Total number of defect found) / (Total number of defect escaped)* 100.
d. Test Effectiveness: It judge the Effect of the test environment on the application.
e. Test Effectiveness = Loss due to problems / Total resources processed by the system.