Usability

What is the range of errors that are possible using the product, and what measures are there to permit users to recover from them?

• Utility

• Safety

• Memorable

• Learnable

Is the product capable of allowing people to learn, carry out their work efficiently, access the information that they need, or buy the goods, that they want?

• Efficiency

• Effectiveness

• Memorable

• Learnable

Once users have learned how to use a product to carry out their tasks, can they sustain a high level of productivity?

• Efficiency

• Effectiveness

• Memorable

• Learnable

Does the product provide an appropriate set of functions that will enable users to carry out all of their tasks in the way they want to do them?

• Utility

• Safety

• Memorable

• Learnable

Is it possible for the user to work out how to use the product by exploring the interface and trying certain actions? How hard will it be to learn the whole set of functions in this way?

• Utility

• Safety

• Memorable

• Learnable

What types of interface support have been provided to help users remember how to carry out tasks, especially for products and operations they use infrequently?

• Utility

• Safety

• Memorable

• Learnable

Draw a simple interface to log in for (any) android apps.