**7.3 Advancement of personae and scenarios to specify the system concept and HMI design solution**

In line with a human factors approach, the proposed concept was modelled using both personae based and scenario-based design methods. Driver profiles were segmented from the perspective of driver persistence, driver health situation and ability. Overall nine driver profiles were identified. This includes:


These profiles were then decomposed into a series of personae. Each persona included information about the older adult's goals, their ability and health, medications, typical driving routines, typical driving behaviours and driver pain-points. For more information, please see Appendix B.

In parallel, several scenarios were defined. These scenarios followed from (1) the project goals (i.e. top down approach) and, (2) specific driving challenges and older adult driver behaviours, as identified in the literature review (i.e. bottom up approach). These include:


As indicated in **Table 1**, the different scenarios were classified in terms of interpretation challenges.

Following this, the scenarios were associated with specific user profiles and personae (see **Table 2**).

Lastly, the specific scenarios were further decomposed in relation to (1) a time sequence/text narrative, (2) the sensing framework and behaviour of sensor technology and machine learning, and (3) multi-modal communications.
