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1. Functionality in a user interface is about allowing users to be able to perform the required tasks they need from the system.

2. Ease of use interface must have clear navigation, good labelling and simplified input methods.

3. Accessible interface should consider the individual needs of users with disabilities. Such as using a clear and simple interface, high contrast colour schemes and support changing of sizes

4. Error reduction in a user interface can be achieved through validation/verification check, input masks and warning messages.

5. Intuitive interface is easy to use even with little training. This can be achieved by making it easy to use and keeping the interface similar to paper forms or previous systems.

6. The performance of a user interface can be improved by ensuring that taks can be completed in few steps, it's easy to navigate and reducing the likelihood of errors arising.

7. Combatibility affects the user interface. A highly compatible interface will allow data to be inputted to and from different IT systems.