Think about the following evaluation. A call center operator answers enquiries about insurance claims. This involves talking to customers on the phone while accessing their personal data and claim details from a database. You are responsible for the user testing of new database software to be used by the operators. What aspects of usability do you think it is important to evaluate, and how would you measure them? Now think about the same questions for an interactive multimedia website which is an on-line art gallery. The designers want to allow users to experience concrete and conceptual artworks presented in different media.