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Task Analysis (GOMS (info provided (decomposition of unit tasks,…
Task Analysis
GOMS
info provided
decomposition
of unit tasks
complexity
representation
Micro
cognition
GOALS
what the user wants to achieve
Operations
action performed by user
Methods
a sequence of operations
Selection rules
deciding between alternative methods
HTA
intemediate
info provided
plans for a task
behaviour of individual performing task
task
hierarchical structure
hierarchy of plans and actions
OSTA
info provided
effect on new system on work environment
users skills for performing tasks
macro
environment
Not as detailed as HTA
Observation
verbal protocols
questionaires
structured interviews
understand the tasks that our systems is designed to support
