Abstract: The embodiment of the invention relates generally to the methods and systems to determine the reliability of human-computer interactions for achieving a mission task in an automated system using a Task Reliability Analysis Tool (TRAT). In some examples, the TRAT can capture the details of human computer interactions while performing operator actions, allocating time-on-action distribution and conducting task evaluations. The allocated time-on-action distribution to the operator actions and to each task can be used subsequently to predict time to complete a task, and likelihood of failure for an infrequently performed task.