Cumulative probability of detecting an intruder by alarm systems

Currently various methodologies, procedures and software tools are used worldwide for the quantitative assessment of the reliability or effectiveness of the systems for protecting objects evaluating the interaction between the breakthrough resistances and the probabilities of detecting by alarm systems. Their frequent drawback is the fact that currently some concrete values or procedures for acquiring the individual variables are missing, or that these variables do not take into account all the significant influences of the environment. This article defines the possibility of a more complex calculation of one of the basic output quantities, i.e. the cumulative probability of detecting an intruder. Besides the newly defined functional dependences between the input parameters of this output quantity, the article also introduces concrete values of some parameters acquired through experiments (e.g. the probabilities of detecting an intruder by the PIR detector under standard or specific conditions).