CIOs should not gather functional requirements in isolation as this can be just as dangerous as canvassing the wrong people, ... functional and non-functional requirements, ...

What Are Non-Functional Requirements, And Why Do They Matter? NFRs are system qualities that go beyond basic features, ensuring the system performs well under real-world conditions.

Splitting behavior in functional and non-functional is — in low-level IT-engineering terms — a no-op. Now, thirty years ago, when we had relatively little IT, mostly providing functions ...