tP: The product

In this semester, we are going to enhance an AddressBook application.

This product is meant for users who can type fast, and prefer typing over mouse/voice commands. Therefore, Command Line Interface (CLI) is the primary mode of input.

• Recommendation-CLI-First Following from the Constraint-Typing-Preferred, if the app is optimized for the target user (graded under the product design criterion), a user who can type fast should be able to accomplish most tasks faster via CLI, compared to a hypothetical GUI-only version of the app. For example, adding a new entity via the CLI should be faster than entering the same data through a GUI form.
  Therefore, the input to the app needs to be primarily CLI. The GUI is used primarily to give visual feedback to the user. While we don't prohibit non-CLI inputs, note that such inputs will reduce the suitability of the product to target users. Therefore, give CLI alternatives to mouse/GUI inputs, if applicable.
  Also keep in mind:
  • Regular typing is usually faster than using key combinations.
  • One-shot commands are faster over multi-step commands. If you provide a multi-step command to help new users, you can also provide a one-shot equivalent for regular/expert users.