What do you mean by test envelop , test points and test range?My posted question is related with Research Methodology

The term test envelop refers
to the limits of what can actually be tested in a particular research project.  If
you've ever heard the phrase "push the envelope," it means to expand the limits or push
the boundaries of what is possible.

Test
points refer to the specific items that are being tested in a particular
research experiment or test.  For example, some test points for an individual being
assessed for Attention Deficit Hyperactivity Disorder (ADHD) are impulsivity and
bordem.

Finally, test range
refers to how much of something can be tested.  Don't get this confused
with test envelop; test envelope refers to the broader and more general limits of a
test, while the test range refers to the level of specific points that can be
measured.