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HCI 3e - Ch 15: Task analysis

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Alan Dix
Alan Dix

Chapter 15: Task analysis from Dix, Finlay, Abowd and Beale (2004). Human-Computer Interaction, third edition. Prentice Hall. ISBN 0-13-239864-8. http://www.hcibook.com/e3/

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chapter 15 task models
What is Task Analysis? ,[object Object],[object Object],[object Object],[object Object]
An Example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Approaches to task analysi s ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
general method ,[object Object],[object Object],[object Object]
Di ffe rences from other techniques ,[object Object],[object Object],[object Object],[object Object],[object Object]
Task Decomposition ,[object Object],[object Object]
Textual HTA description ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Generating the hierarchy ,[object Object],[object Object],[object Object],[object Object]
Tasks as explanation ,[object Object],[object Object]
HTA as grammar ,[object Object],The cat sat on the mat. letter noun det noun phrase . . . . . . . . . . . . lexical syntax
parse scenario using HTA 0. in order to clean the house 1. get the vacuum cleaner out 2. get the appropriate attachment 3. clean the rooms 3.1. clean the hall 3.2. clean the living rooms 3.3. clean the bedrooms 4. empty the dust bag 5. put vacuum cleaner and attachments away get out cleaner fix carpet head clean dinning room clean main bedroom empty dustbag clean sitting room put cleaner away 1. 2. 3.2. 3.3. 3.2. 3. 4. 5. 0.
Diagrammatic HTA
Refining the description ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Refined HTA for making tea
Types of plan ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
waiting … ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],see chapter 19 for more on delays!
Knowledge Based Analyses ,[object Object],[object Object],[object Object],[object Object]
Knowledge–Based Example … ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Task Description Hierarchy ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Larger TDH example ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
More on TDH ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Abstraction and cuts ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Entity-Relationship Techniques ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Objects ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Attributes ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Actions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Actions (ctd) ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
example – objects and actions ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Events ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Relationships ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
example – events and relations ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Sources of Information ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Early analysis ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Uses – manuals & documentation ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],To make cups of tea boil water –– see page 2 empty pot make pot –– see page 3 wait 4 or 5 minutes pour tea –– see page 4 –– page 1 –– Make pot of tea warm pot put tea leaves in pot pour in boiling water –– page 3 –– once water has boiled
Uses – requirements & design ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]

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HCI 3e - Ch 15: Task analysis

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  • 12. parse scenario using HTA 0. in order to clean the house 1. get the vacuum cleaner out 2. get the appropriate attachment 3. clean the rooms 3.1. clean the hall 3.2. clean the living rooms 3.3. clean the bedrooms 4. empty the dust bag 5. put vacuum cleaner and attachments away get out cleaner fix carpet head clean dinning room clean main bedroom empty dustbag clean sitting room put cleaner away 1. 2. 3.2. 3.3. 3.2. 3. 4. 5. 0.
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  • 15. Refined HTA for making tea
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