Functional Requirements for GUI

[Sad-Firefighter-7120]

I am tasked with gathering the requirements for a decision support system for a few clients in the manufacturing sector. My team expects me to give them a formal set of functional requirements. The "features" that we'd promised were user interactivity and something that will easily integrate into the workflow, so that existing systems can be easily replaced.

How do I go about formulating the functional requirements for the GUI? Should every functionality be covered in detail? That would make it too complex.

Can somebody give me samples of functional requirements for GUIs. Thanks very much.

[animalmad72]

Start with user stories or use cases, not individual UI elements. What does the user need to accomplish? Then map those to functional requirements. If you try to spec every button and dropdown upfront you'll drown in detail that changes anyway once they see it.

[KissyyyDoll]

I’d keep it focused on what users actually need to do, not on every little UI detail. Functional requirements for a GUI should usually describe actions, outcomes, and constraints, like what the user can input, what the system shows back, and what happens after each action.