OHS Online task quantification

That's a very good question! OHS Online quantifies an overall task according to 'worst case scenario', that is to say according to the most harmful hazard it has associated to it (the highest risk). If we look at the task we inserted, 'Using a Ladder', we can see that the Risk Rating of the task has been valued at 8 (Possible Risk). 

A lot of the hazards, associated to the task are valued at 6, however, three of the hazards are valued at 8, so the overall quantification for the task will be 8. Remember, in health and safety, we always look at the 'worst case scenario'.