Non-Functional Specifications
Non-functional Specifications, unlike functional ones, do not involve transforming inputs into outputs but are crucial for a software project's success.
These specifications set the development framework and affect user experience, focusing on the system's operation and performance rather than its functionality.
Non-functional specifications are from the user’s perspective in that they directly influence the standards for interface design including;
use of menus
use of frames to group items
use of colour
placement of common elements
wording of messages and the tone of the language
font to be used for prompts and user inputs
size and nature of icons