In these situations one can also ask about the "adaptivity gap", which is the difference in how many tests are required if one is allowed to be adaptive -- make

In these situations one can also ask about the "adaptivity gap", which is the difference in how many tests are required if one is allowed to be adaptive -- make a test, look at the result, then decide what to test next -- versus nonadaptive, i.e. decide in advance what all the tests will be and conduct them all at once.