It is practical to try to automate every test as there is generally enough time to do so.

Automated testing tools do not replace manual testing or the test engineer.

In the context of return on investment, the benefits of test automation are seen approximately during the first or second run.

Testing applications that change regularly is the specialty of test automation.

Regression testing is where test automation shines.

If the test automation tool returns passing results upon execution, it means that the test being automated itself has also passed.

Test independence when it comes to creating test scripts is ideal not only because it is doesn't require much to achieve, but also because it makes sure that each script can be run independently of other scripts in the test suite. This ensures less failures due to script errors brought about by script inter-dependency.

Script Debugging is considered part of script development/maintenance and thus, no special considerations are required in terms of the time it takes to do this.