IIt is a method that allows the quantitative evaluation of the risk of fire, both in industrial buildings as in public densely occupied. Its is possibly the best known and applied method of its kind in Spain.

The method covers all buildings or parts of the building that are separate compartments firewall adequately.

The method of the calculation of the potential risk of fire (B), which is the relationship between these potential risks due to the building and contents (P) and the means of protecting present (M).

B = P/M

It calculates the risk of fire cash (R) for the compartment firewall bigger or dangerous building, being its value

R = B.A

being factor (A) the danger of activation

It sets a fire hazard accepted (Ru), from a normal risk corrected through a factor that takes into account the greater or lesser danger to people.

The assessment of the level of fire safety is made by comparing the actual risk of fire with fire risk accepted, earning the safety factor against the Fire (i), which is expressed in such a way that:

i = Ru /R

When i ≥ 1, the security level is considered ENOUGH being INSUFFICIENT when i <1