Some error-producing conditions are more powerful than others. The table below shows estimates of how different conditions create the risk of error. Poor instructions or procedures are said to triple the rate of error. Lack of experience with the task is estimated to result in a 17-fold increase in the risk of error.
| Condition | Risk Factor |
| Lack of familiarity with the task | X17 |
| Time shortage | X11 |
| Information overload | X6 |
| Poor feedback from the system | X4 |
| Inexperience | X3 |
| Poor instructions or procedures | X3 |
Source: CASA Human Factors Engineers Resources, Civil Aviation Safety Authority, 2013