• Watch the users to see how they do something that you want to model in your application
• Prototype the user requirements to paper before you proceed with detailed design
• Present your prototype to users and get feedback
• Deploy the features you develop soon, to get feedback. Don’t wait to finish the development to show it to end users

Guidelines for application development

• Use standard gui controls for common actions
• Display the correct messages to the users
• Don’ t let the users guess what’s happenning
• Show users the curent state of the application
• Tell users what happened when a user submits a command
• Display help messages to complex features

Tips for managing development projects

• Have in mind what the software must do
  • Describe the vision of the document
  • Have a clear list of features that will be developed
  • Have a clear list of features that will not be developed
• Keep a list of tasks with assignments
• Code reviews every week to improve the code quality

Why an application fails?

• It’s not usable. But how can we define a usable applicaton? I think that if the users know how to us and to operate the User Interface of the application then this is usability
• Sometimes the features of an application don’t solve the correct problem
• The features are complicated or users to understand how to use them
• It doesn’t solve all the required features