Abstract
A long-lasting product needs to satisfy conditions where customers begin, continue, and repeat to use in product lifecycle. We assumed that perceived quality such as texture contribute to satisfy such conditions. User's evaluation of perceived quality changes during use due to change of user's sensitivity and sense of value. To realize a long-life product, designers have to consider such dynamically changeable evaluation as well as first time evaluation of a product. In this paper, we developed an experimental methodology to acquire total evaluation of products and evaluate perceived quality that affects the total evaluation of the products under different situations where customers begin, continue, and repeat to use. We applied the methodology to the design of a face lotion container. We asked 30 female participants to use a sample daily for one month. Participants were required to recoed their opinions about the samples (online assessment). On the first day, one month later (the final day), and another one month later (after finishing the sample), we invited the participants to the laboratory and asked them to assess five samples that contained different surface finishes (offline assessment). Based on these reults, we demonstrated that the methodology can acquire total evaluation of products and evaluate perceived quality that affect the total evaluation of the products at each situation of the life cycle.
