Task analysis is used mainly to investigate an existing situation. Hierarchical task analysis (HTA) is used to break down a task into subtasks. Consider one of your daily routine tasks, such as filling your car with gas or getting money from the automated teller machine (ATM). Now, break your chosen task into subtasks and list them. Analyze these subtasks to complete the task from the user's viewpoint. Do you think all the subtasks listed are critic
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