A thoughtful approach to web site quality. A testcase is the difference between saying that something seems to be working okay and proving that a set of specific tasks are known to be working correctly.
Some tests are more straightforward than others.
For example, say you need to verify that all the links in your web site work. You simply need to decide which one of more of these tests best suits your site structure, your test resources, and your need for granularity of results. You run the test, and you get your results showing any broken links. Notice that you now have a list of broken links, not of incorrect links. If a link is valid syntactically, but points at the incorrect page, your link test won't catch the problem.