How are non-functional requirements different from functional requirements?

Question

Accepted Answer

Functional
Non-Functional




What the system does
How the system behaves


Features & actions
Quality & performance


Example: Close a case
Example: Page loads in 3 seconds

Functional	Non-Functional
What the system does	How the system behaves
Features & actions	Quality & performance
Example: Close a case	Example: Page loads in 3 seconds

How are non-functional requirements different from functional requirements?

Answer with Explanation