Hierarchical Task Analysis (HTA) is a systematic approach used to identify and describe tasks and subtasks necessary for a user to accomplish a specific goal. It is often used in the fields of human factors and ergonomics to design, evaluate, and improve job duties, equipment, and work environments. The framework helps in understanding the complexity of tasks, improving efficiency, and enhancing user safety by focusing on the relationships and sequences of tasks.
Identify the primary goal of the analysis. | Break down the primary goal into main tasks. | Decompose main tasks into subtasks and further into operations if necessary. | Analyze each task and subtask for potential improvements. | Develop plans for task execution, including necessary resources and constraints. | Evaluate the efficiency and safety of the task structure.
Start with a clear definition of the overall goal. | Involve stakeholders and users early in the analysis process. | Regularly review and update the task analysis as needed.
Provides a clear and structured breakdown of tasks | Enhances understanding of task requirements and sequences | Improves safety and efficiency in task execution
Can be time-consuming | May not account for all variables in complex environments | Potential over-simplification of human behaviors
When designing new systems or interfaces | When improving or modifying existing operational procedures
In highly unpredictable or creative tasks | When time constraints do not allow for detailed analysis