A user trial involves getting the people who will use or buy the product to try it out and share their thoughts.
A questionnaire is a structured set of questions about the product which aims to capture people’s opinions after they have seen and/or used it.
The questionnaire is designed to provide the exact type of information the designer wants.
As part of your evaluation, you should compare the product you have designed to other similar products that are available and evaluate the differences and similarities.
As part of your evaluation, you should determine whether your final design meets the points defined in the specification.