Evaluation tests are qualitative tests excellent for getting detailed information on the functionality of the packaging design. But the weak side of evaluation tests is that in practice you will only have resources for testing small groups of test persons. It can be critical that the tests are not statistical safe and many companies use both evaluation tests parallel to hall test and/or observing tests.
The most common used evaluation test is focus groups (see later) and also programmed interviews can be used. These techniques take time and test persons have to be present in 1-4 hours. It will be difficult to test under realistic conditions. You have to have an appointment beforehand with your test persons and also the test person will only evaluate own behaviour.
The strong side for evaluation test is the time for focusing on the specific problem. Often ideas and problems unknown for the designer are located. And alone for this reasons it is an excellent tool for a packaging designer.