1. Concept Generation Tools
6-3-5 Method
Morphological Chart

2. Concept 1 -Recumbent design.
-Has a “cup” design for holding the prosthetic.
-Shifters mounted on left handle.
-Brakes through the use of a friction pad on the bottom of the bike.
Discussion:
-Recumbent design would be comfortable.
-Prosthetic attachment would be easy
-Brake system unintuitive
-Expensive

3. Concept 2 -Based on classic bike design.
-Design was edited to put brakes on left hand along with shifters (different from sketch.
-Prosthetic is held in place by a simple locking mechanism.
Discussion:
-Design would be intuitive.
-Not much more expensive than a normal bike.
-Would feel natural.

4. Concept 3 -Designed around the idea of modifying an existing bike.
-Mounts shifters on the frame of the bike, and puts brakes on left handle.
-Hold for prosthetic is a horizontal bar.
-Comes with detachable arm harnesses
Discussion:
-Design was praised for modifying an existing bike, lowering the price.
-Arm harnesses deemed bulky and unsafe.
-Down-tube shifters, while inexpensive, were looked at as annoying.
-Horizontal bar for prosthetic deemed unsafe

5. Selection Pairwise Comparison Chart Design 1 eliminated
Scores given to Design 2 and Design 3
Design 2 Chosen