How to calculate bug rate?

Question

On the base of number of test cases can we calculate bug rate ? And if yes then how is it possible to calculate bug rate?

Answer 1

Assume this way that you have n test cases, x is true scenarios, and y are error (bug) scenarios, so:

n = x + y

During testing and false positive, if x out of n turns to be true and y are false, then bugs count is y/n. For example, you developed 10 test cases and during testing, there are 4 bugs reported.So you can think of a bug rate in this case is:

Bug rate =  4/10 * 100 = 40%

However this is not an accurate solution as you may need to include some other parameters also. But this is just a starter.

Answer 2

Bug Rate:

• No. of Test Cases Failed / No. of Test Cases Executed.
• Calculation of how many bugs you found from your Test Cases. Test Cases = 100; Bugs Found = 10; Bug Rate = 10%

Answer 3

To put it very simple N is the total number of test cases & x is the total number of test case fails encountered(not total number of bugs as you may get two or more bugs for one test case). Then Bug rate = x/N * 100 = y%...

Answer 4

No of bug per case:

bug number / case number