The following metrics can be used to represent the level of preparedness of test design :
1. Preparation Status of Test Cases (PST):
A test case can go through a number of phases or states, such as draft and review, before it is released as a valid and useful test case.
Thus it is useful to periodically monitor the progress of test design by counting the test cases lying in different states of design – create, draft, review, released and deleted.
It is expected that all the planned test cases that are created for a particular project eventually move to the released state before the start of test execution.
2. Average Time Spent (ATS) in Test Case Design :
It is useful to know the amount of time it takes for a test case to move from its initial conception, that is, create state, to when it is considered to be usable, that is, released state.
This metric is useful in allocating time to the test preparation activity in a subsequent test project. Hence it is useful in test planning.
3. Number of Available Test (NAT) Cases :
4.Number of Planned Test (NPT) Cases :
This is the number of test cases that are in the test suite and ready for execution at the start of system testing.
This metric is useful in scheduling test execution. As testing continues, new, unplanned test cases may be required to be designed.
A large number of new test cases compared to NPT suggest that initial planning was not accurate.
5. Coverage of a Test Suite (CTS) :
- This metric gives the fraction of all requirements covered by a selected number of test cases or a complete test suite.
The CTS is a measure of the number of test cases needed to be selected or designed to have good coverage of system requirements.
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