By their nature, events classifiable in the LTI category have very low frequencies of occurrence, therefore, to statistically grasp their trend over time, it is necessary to embrace a much longer observation period than a single year; to this end, the IOGP (International Association of Oil & Gas Producers), whose statistical elaborations are used by us as an industry benchmark in the HSE field, has adopted the 5-year rolling formula for the LTIR indicator, and our organization has also done similar elaboration.

* *on one million hours worked