How to set Test coverage and Found Stage in VSTS

When reporting bugs we need set the fields such as Area, Iteration, Found In Build, Test Coverage, Found Stage and so on.

In "Test Coverage" field there are three choices, "Covered", "Covered, missed", "Covered, not validate", and "Not covered". I guess the "Covered, missed" means that there is teps in one test case for the bug but we missed to test, doesn't it? And what does the "Covered, not validate" mean?

In the field "Found Stage" what will we set? and commonly how many stages in software engineering? what they are? I think all the stages can include all the bug found stage, for example a bug found by customer.

[724 byte] By [swanwang] at [2007-12-24]