GTA GroupWare Task Analysis

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GTAGroupWare Task Analysis

• Task analysis concepts
• GTA -Task analysis in design of complex systems
• Methods of task knowledge collection
• GTA conceptual framework
• Representations and tools
• Sources

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Task analysis concepts

• Complex tasks and goals (n to 1)
• hierarchies, flow, multiple processes
• users unit tasks
• (Card, Moran Newell)
• systems basic tasks (Tauber)
• primary tasks
• secondary tasks
• actions, communication acts

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GTA -Task analysis in design of complex systems

• Complex systems
• multiple users who interact / collaborate
• with / through technology
• Phases in iterative design
• analysis
• specification
• evaluation

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GTA -Task analysis in design of complex systems

• iterative design

analysis
evaluation
specification
implementation
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GTA -Task analysis in design of complex systems

• analysis

Task model 1 current task world
Task model 2 envisioning the future
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Methods of task knowledge collection

• Knowledge sources
• domain experts / (future) users
• observation of expert behavior
• documents
• interaction in situation

Task model 1 current task world
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Methods of task knowledge collection

• domain experts / (future) users
• knowledge elicitation
• e.g. Sebillotte / Graesser question method
• Question explain as detailed and complete as
  possible how you
• Answer X and therefor Y
• X because of Y
• Additional questions Why X? / How X?

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Methods of task knowledge collection

• Interaction in situation (people, artifacts,
  history)
• Ethnographic methods, e.g.
• interaction analysis (Jordan, Henderson)
• Identify hot spots
• video - content log - review with actors -
  generate hypothesis - compare with alternative
  records - identity patterns

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Methods of task knowledge collection

• Task model 2
• envisioning the
• future

• Knowledge sources
• task model 1
• (needs, inconsistencies, conflicting goals)
• client (requirements, standards, law)
• technology (constraints, possibilities and
• expectations, challenges)

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GTA conceptual framework

• Complementary viewpoints, redundant descriptions
  and cross references
• Agents
• Work
• Situation

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GTA conceptual framework

• Agents
• actors (individual humans, institutes and groups,
  machines, systems) with attributes
• roles, defined with tasks and object relations
• organization (structure of actors, allocation of
  roles, delegation and mandates)

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GTA conceptual framework

• Work
• task / goal structure / actions (related to
  roles)
• task descriptions (objects and situation)
• hierarchical decomposition
• temporal structure and triggering
• protocols and (expert) strategies - situated

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GTA conceptual framework

• Situation
• objects in object structure (type relations,
  semantic relations)
• environment
• history of situation

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Representations and tools

• GTA representations
• conceptual entities
• structures
• media registrations

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Representations and tools

• Conceptual entities
• relation to other entities
• template format for different concepts
• Task, Object, Role, Agent, Event

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Task Template
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Object Template
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Role Template
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Agent Template
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Event Template
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Representations and tools

• Structures, relation between entities of a type
• type hierarchies (is a)
• decomposition trees
• semantic relations (contains)
• flow (of data, of control, triggering relations)

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Representations and tools

• Media registrations
• video clips
• sound track
• picture

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Representations and tools

• Tools a design environment for collaborative
  design
• EUTERPE
• editors for representation types
• a repository of task model elements
• representations as a view on the database
• tools for analysis and reasoning
• translation to HTML

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Task World Ontology
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Sources

• Http//www.cs.vu.nl/martijn/gta
• literature on GTA
• EUTERPE tool
• examples