Measuring or Predicting Workload

Time-Line Analysis: Measure amount of time spent on task relative to amount of time available.
- 100% is all time available is being used.
- Gives estimate of how time use changes during course of task, e.g. flying.
Primary Task measure: Change the nature of the main task and see how performance changes.
Secondary Task measure: Give a secondary task. Measure changes in its performance as the primary task is changed in difficulty.
Subjective Measures: self-report of users.
These measures do not always correlate well.

Notes:

The secondary task is usually an intermittant task.