What is not needed to determine the system safety ratio?

The determination of a system safety ratio focuses on evaluating how safe a rescue system is in relation to the loads it may encounter. This involves assessing factors such as the desired safety margin, load weight, and the breaking strengths of each component involved in the system.

The desired safety margin is a critical factor as it sets a benchmark for the necessary safety level based on the operational context. Load weight is essential because it provides a measure of the total forces that will be exerted on the system during a rescue operation. The breaking strengths of each component are also crucial, as they indicate how much force the materials can withstand before failure.

In contrast, knowing the number of victims does not directly relate to calculating the system safety ratio. While the number of victims could influence the overall load or required capacity of the system, the safety ratio itself specifically requires knowledge of the load weight and component strengths rather than the number of individuals involved. Thus, it is not a necessary factor in the calculation of the system safety ratio.