How to calculate Test Design Coverage ?

Test Design Coverage is the ratio of Total number of testable requirements mapped to test cases or Scripts to Total number of base lined testable requirements. This metric helps to measure the functional coverage of test cases designed and improve the test coverage.

Test Design Coverage  is calculated at test design phase. It is measured in percentage (%).

How to calculate Test Design Coverage:

Test Design Coverage = (Total number of testable requirements mapped to test cases or Scripts) / (Total number of base lined testable requirements)*100

Total no.of base lined testable requirements mapped to test cases	Total no. of base lined testable requirements	Test Design Coverage
990	1000	99

Test Design Coverage = 990 / 1000 *100

                                     =   99 %