Figure has a blue and white background with a screen drawing in the center and two bubbles one showing a thumb up and another one with an eye which represent
“vision”
Must be able to communicate results to users
| Requirement | Specification | |
3 | Device must be able to communicate results to users. | Screen size: 4in x 7inText: 18pt size, screen: 4in x 7inFont Type Courier (serif, monospaced) |
| Justification | Target users are unable to differentiate between colors Self-interpretation | Research surveys show that these are the most ideal fonts and sizes for elderly individuals in terms of readability and reading speed. |
Verification: Confirm that the output is the correct information
Validation: Surveying elderly and vision impaired individuals on user interface