1. Menu Creation 1.Perform a task analysis for Raskin’s idea of user-created menus (p.100). 2.What should the commands for the menu creation system be? NB. A task analysis determines the tasks and their hierarchy the user expects to complete using the system and any time constraints on the tasks (e.g. creating a document before printing it)

2. Menu Creation Answers Add, delete menu item Create new menu or edit existing menu Add new item to existing menu with wizard –What it does –Text –Icon –Shortcut –Location Example of existing system?

3. Text Editing What operations do you use to change: 1.hear to here 2. to 2.37 3.pan to plan to plane to piece 4.A long URL that ends image42.jpg to one that ends image45.jpg Generalize these examples to editing rules for text input.

4. Text Editing Answers Two backspace, two keys Search, then correct Click, drag to select (L to R) and then retype Click at insertion point, type letter Type letter

5. Quick-Correct What are the quick-correct operations for: 1.A keyboard keystroke 2.Pointing 3.Selection 4.A button tap What design principles should quick-correct operations satisfy?

6. Quick-Correct Keyboard keystroke—backspace Pointing—repoint Selection—reselect Button tap—toggle off Design principles: 1.Least number of steps 2.No rehoming

7. Display Parameter Settings Referring to Raskin’s list of system responses to display parameter incompatibility (p.147), 1.What is the error cost of each? (In what units is error cost measured?)

8. Display Parameter Settings Error cost: 1.Crash, manual reboot: restart applications 2.Crash, bad message, restart button: restart applications 3.Adjust settings, crash: unsaved content 4.Reset settings: 13 steps 5.Ask whether change: 7 steps Measure with time, with keystroke level operations, with effort

9. Saving and Retrieving Named Files 1.Perform a task analysis for saving and retrieving named files through an application program. 2.What should the set of commands be?