I am coining a new term: "neurorequirements". Neurorequirements are requirements formulated in terms of the brain states of users.
Product managers strive to formulate requirements in precise, measurable terms. As I mentioned in my article, "How to Guarantee Product Failure", an ease of use requirement might:
- Specify a typical user’s prerequisite skills and experience
- Place a limit on the number of user gestures (keystrokes, mouse clicks, etc.) it should take to accomplish a functional task
- Place a limit on the amount of time that it will take a typical user to perform the functional task