Task Analysis. IACT 403 IACT 931 CSCI 324 Human Computer Interface Lecturer: Gene Awyzio Room: 3.117 Phone: 4221 4090 Email: [email protected] Overview. What is task analysis? Task Analysis Methods task decomposition knowledge based analysis entity-relationship techniques
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steering steering wheel, indicators
ignition, accelerator, foot brake
clutch, gear stick
headlights, hazard lights
front wipers, rear wipers
front washers, rear washers
temperature control, air direction, fan, rear screen heater
hand brake, door lock
numerous othersKnowledge Based Analyses
Procedural `how to do it' manual
from HTA description
useful for extreme novices
or when domain too difficult
assumes all tasks known
from knowledge or entity/relation based analyses
good for open ended tasks
Example: tea making manual from HTAUses of Task Analysis I
To make cups of tea
boil water - see page 2empty potmake pot - see page 3wait 4 or 5 minutespour tea - see page 4
Make pot of teaonce water has boiledwarm potput tea leaves in potpour in boiling water
By convention, check-boxes are used on computer screens where several options are allowed.
Respondent should also be able to answer "I don't know", "all" or "none".
Questions can have any number of responses or a fixed number as illustrated below.
e.g. Which three of the following best describe the show?Multiple Response
After sales support
Value for money
Other (please specify)