the likelihood of the hazard or risk concerned occurring
the degree of harm that might result from the hazard or risk
knowledge about the hazard or risk, and ways of eliminating or minimising the risk
the availability and suitability of ways to eliminate or minimise the risk, and
after assessing the extent of the risk and the available ways of eliminating or minimising
the risk, the cost associated with available ways of eliminating or minimising the risk,
including whether the cost is grossly disproportionate to the risk.