Product design · 2026

Crutch-chair concept

A combination crutch and chair developed through detailed design and product analysis.

Problem

Traditional crutches provide users mobility but offer limited opportunities for users to rest during extended periods of time. Through customer research with current and recent crutch users, my team identified a need for a product that maintains the portability and mobility of crutches while providing a convenient seated rest option. In response, we developed a crutch-chair combination product integrating both functions.

CAD views of the crutch-chair in its crutch and chair configurations

Engineering Approach

I conducted voice-of-customer research and translated customer needs into measurable engineering requirements through QFD analysis, establishing key design targets including mass, weight capacity, stability, and setup time. I then collaborated with group members to develop the product architecture and preliminary CAD, evaluating how the crutch and chair components could be integrated while maintaining functionality and portability.

I also contributed to the bill of materials and cost analysis, comparing the projected manufacturing cost of the combination product with the cost and functionality of the two existing market alternatives. Throughout the design process, I applied DFM/DFA principles to components by identifying appropriate materials, then evaluating manufacturing processes, component interfaces, and assembly methods.

Engineering Takeaways

The project resulted in the portable crutch-chair concept designed around the needs of mobility-device users. The project provided experience with an end-to-end mechanical product development process, from customer research and requirements to a manufacturable product concept, while balancing competing requirements including weight, portability, stability, durability, and functionality.

Tools/Methods

CAD, QFD, product architecture, customer research, DFM/DFA, product specifications, cost analysis