1. Part 2d: Requirements Chapter 2: How to Gather Requirements: Some Techniques to Use Chapter 3: Finding Out about the Users and the Domain Chapter 4: Finding Out about Tasks and Work Chapter 5: Requirements Gathering: Knowledge of the User Interface Design Chapter 6: Thinking about Requirements and Describing Them Chapter 7: Case Study on Requirements, Part 1 Video: Paper Prototyping

2. Prototypes The quickest way to build something is, first to build something else Most frequently used modern method for communicating, getting feedback, and evaluating design of new software products

3. Two major types of prototyping 1.Throwaway Prototyping Also known as Rapid Prototyping The objective of throw-away prototyping is to validate or derive the system requirements. Start with those requirements which are poorly understood 2.Evolutionary Prototyping –The objective of evolutionary prototyping is to deliver a working system to end-users. –Start with those requirements which are best understood.

4. Categories of Prototypes Low- Fidelity High- Fidelity Horizontal Vertical

5. Discussion What are some disadvantages of high- fidelity prototypes Wizard of Oz prototypes