This paper reports a study that explored the usefulness of positive emotional granularity (PEG) in the product development process. PEG reflects the ability to interpret and represent the experience of positive emotions with precision and specificity. Interviews were conducted with twenty-five design professionals to understand their needs and expectations with respect to the value of PEG in product development processes. Across all product development stages, sixteen PEG benefits were identified and grouped into seven key opportunities: getting in-depth understanding of user emotions, determining the emotional impact of a product, dealing with organizational support, keeping continuity of emotional intentions in communications, facilitating design creativity, strengthening emotional coherence and managing emotions within a product development team. The findings indicate that the benefits of PEG are mainly associated with activities in design conceptualization and evaluation, being less relevant in the embodiment phase. The article also reports on the different attitudes of professionals with different roles in product development towards the relevance of PEG for their practices. The implications for research into facilitating PEG and recommendations for developing design tools are discussed.@en

Background Card-based design tools have gained popularity as a means to communicate research insights and to make them usable in a design process. There are various examples of card tools and guidelines for developing a card set itself, yet there has been little research into how the usage of card tools can be systematically formulated. Although the existing literature on card tools often presents certain usages, it rarely explicates how the usage was structured, and provides few references to the underlying decisions. Methods Through a case study of the positive emotional granularity cards, this paper presents a bottom-up approach in which designers’ needs and their own techniques to use the cards are reflected in formulating new card usage guidelines. Three design workshops were conducted, each of which explored how designers made use of the cards in the three design activities respectively: (1) assimilating nuances of positive emotions; (2) specifying emotional intentions; and (3) generating product ideas. In a creative session with design researchers, the workshop findings were translated into usage guidelines. Results There were individual differences in designers’ ability to make use of the PEG cards. At one end of the spectrum was the designer who immediately started to play and explore the cards, creating his or her own usage rules. At the other end of the spectrum was the designer who needed instructions to get started. Most designers explored usage, but at the same time they felt insecure about getting value without having some guidance. The workshops allowed us to spot the benefits and drawbacks of the techniques the designers used, and to identify their needs in using the PEG cards. The creative session resulted in the PEG card guidelines that assist and inspire designers in the three design activities. Conclusions Provisional usage guidelines can considerably contribute to a card tool’s usefulness, even if the card usage is envisioned to be open-ended and versatile. The bottom-up approach proved valuable to generate new insights into how a card set can best be used and how designers can be guided when using the card set.@en