Task Analysis Flashcards
Why do we use task analysis?
Task analysis is the study of the way people perform their jobs and achieve their intended goals. The goal of it is to determine what users do, what things they use and the information they must know to achieve their tasks. It helps to better understand user needs, identify tasks the application must support or re-define content scope.
What are the differences between hierarchical task analysis, knowledge based and entity modeling methods?
Hierarchical task analysis focuses on how the task is done, the procedure to achieve the task, the goals and subtasks and the task sequence.
Task Descriptive Hierarchy focuses on the knowledge required for the task, the taxonomy and categories and the organisation of knowledge.
Entity based analyses focuses on relationships between objects, actions and the people who perform them.
What is the difference between declarative and procedural knowledge?
Declarative knowledge consists of objects and relationships. Procedural knowledge consists of task sequences, goals and subgoals.
Conduct a hierarchical task analysis of starting the ignition of a car. State any assumptions. What is the declarative and procedural knowledge that could be gathered from this task?
Assumptions:
1. The car has a conventional key ignition system (not push-button or keyless entry).
2. The driver is already seated in the driver’s seat with the seatbelt fastened.
HTA:
0: Starting the Ignition of the Car
1. Insert the Key into the Ignition Slot
2. Turn the Key to the Right
3. Hold the Key in the ‘Start’ Position
4. Release the Key After the Engine Starts
Declarative Knowledge: car, key, ignition slot, engine
Procedural Knowledge: insert the key, turn the key, hold the key, release the key when engine starts
For the task analysis of buying a drink from the vending machine, what is the declarative knowledge and procedural knowledge that could be gathered from this task?
Declarative: vending machine, drink, coins
Procedural: buy a drink, put in coins, put in dollars
