Ⅲ. Ideation
Personas
To understand who we are designing for, we created 3 fictional characters who can be our potential users and generated personas for them based on the research data.
Empathy Maps
Then, we wanted to understand how these 3 potential users feel about our product. We make 3 empathy maps that list their attitudes and behaviors in response to some postural challenges.
Design Solutions
Based on the key research findings, we defined 5 design solutions, and each solution would turn into a key function to address user pain points in the final product.
Design Concepts
To turn our 5 design solutions into a viable product, we proposed 2 design concepts with key functionalities that tackle to user pain points.
Posture Optimization App (left) is a mobile-based application integrating AR technology to help optimize sitting posture. Users can use phone cameras to scan a chair, and based on their input data, the system provides personalized instructions on how to sit on it.
Posture Reminder (right) is a desktop application with a screen accessory, consisted of both digital and physical forms. The computer camera is activated to track user posture, and the system can read the data and remind users to sit properly and take work breaks.

Concept Testing
We conducted a 60-minutes testing session with 4 potential users to evaluate the 2 design concepts. We presented the design to the users and asked 15 follow-up questions about their thoughts and reactions. Then, we summarized the feedback and turned it into a chart to compare these two design concepts and evaluate whether they meet the listed design solutions.

Overall, users expressed a positive attitude toward both design concepts. However, they found Posture Reminder more useful, because they believe the user cases of Posture Optimization App are limited to acquiring a new chair, which is not a frequent event for them. Further, based on their feedback, Posture Reminder does a better job of fulfilling the 5 design solutions. Therefore, we decided to move on with Posture Reminder and turned the latter design concept into a wireframe.