Plans should be written next to the branches to describe the way in which the branched operations should be carried out. Hence, the plans should be goal oriented to achieve the success of any field. Applications and limitations HTA is a task description method which is most commonly used as a starting point for further analyses such as multimodal CPA and SHERPA. On its own, HTA does not provide results for usability evaluation; however, you should be able to study the HTA in order to learn about the structure of different tasks. It may also allow you to highlight unnecessary task steps or potential errors that might occur in task performance. HTA is a fairly time-consuming method to carry out as each individual operation in a task needs to be analysed; however, creating a comprehensive HTA can considerably reduce the time required for other modelling methods. See also Business process mapping and business process modeling Cognitive ergonomics Critical path analysis Direct instruction Human reliability Job analysis Programmed instruction Staffing models Workflow Notes Vicente, K. J. (1999). Cognitive work analysis: Toward safe, productive, and healthy computer-based work. LEA. Bennett, K. B., & Flach, J. M. (2011). Display and interface design: Subtle science, exact art. CRC Press. External links Cognitive Performance Group: Methods. Usability.gov (U.S. Department of Health & Human Services): Task Analysis. Human Interfaces in Information Systems (HIIS) Laboratory: ConcurTaskTrees Environment. ErgoTMC (U.S. Department of Transportation): Task Analysis. Behaviorism Cognitive psychology