“Metrics refer to the standards/indicators for measuring or evaluating an incident. An essential element of any improvement program is the measure of existing and future performance. The main three types of metrics include lagging metrics, leading metrics, and near miss and other internal lagging metrics.”
Reference: Process Safety Leading and Lagging Metrics, CCPS, January 2011.
Note that ‘metrics’ is quantitative. Indicators are counted in numbers of a certain category or type over a certain fixed period.