Informing Intentional Use of Prototyping in Engineering Design: Context-Specific Novice Approaches and Stakeholder Feedback

Abstract

Prototypes are essential tools that can be used strategically throughout the design process to increase the likelihood that a product achieves stakeholder needs. Prototyping allows physical or visual form to be given to an idea, and research has shown that prototypes have the potential to support communication and improve product requirements elicitation and design input by enabling stakeholders and designers to engage around a “shared space” – the prototype. Despite the numerous benefits of using prototypes throughout a design process, novice designers often limit their use of prototypes to test and verify a chosen concept during the later phases of their processes. Limited studies to date have investigated novice uses of prototypes during the front-end phases of design and the effects of context, stakeholder type, and prototype type on stakeholder feedback. This research leverages approaches from multiple disciplines to characterize 1) novice designers’ uses of prototypes and 2) the effects of various factors on stakeholder design input during engagement with prototypes. We conducted interviews with engineering design students in different contexts to investigate their use of prototypes. We also developed a prototyping best practice framework to evaluate the intentionality in novice designers’ use of prototypes during design. To deepen our understanding of how prototype type can influence stakeholder feedback, we presented various prototypes of a medical device concept to diverse stakeholders, including medical doctors, medical students and nurses and asked questions to elicit feedback on the design. Research findings indicated that novice designers lacked intentionality when using prototypes. Their prototyping behaviors often occurred unintentionally to satisfy course requirements or as a response to failure or setbacks. Novice designers from different contexts favored different prototype types, and all participants underutilized prototypes, particularly during the front-end phases of design and when engaging with stakeholders. Our results further showed that nuances like prototype type, stakeholder group, and question type influenced the quality of stakeholder feedback. Since variation in prototype type, stakeholder group, and question type had a significant effect on the quality of stakeholder feedback, and since most novice designers did not use prototypes intentionally, our findings point to missed opportunities that likely impact several areas: what novice designers learn about using prototypes, the prototyping practices with which they begin professional practice, and ultimately the human-centered design solutions they create. This research leveraged, and has implications for, engineering design, design education, industrial design, design science, and design research methods. We expect that some of our findings, specifically that 1) novice designers lacked intentionality and underutilized prototypes, and 2) the types of prototypes, stakeholders, and questions influenced stakeholder feedback, are transferable to, and can have a broader impact on, other contexts in which prototypes are used. The fact that novice designers lacked intentionality in prototype use suggests that repeated and reflective practice is needed and informs pedagogical and industrial approaches throughout the engineering education and practice spectrum. We recommend that educators encourage a broader, more frequent use of prototypes during engineering design processes. By doing so, novice designers can develop the knowledge structures necessary to use prototypes intentionally, and intentionally with stakeholders, during design.