Governance
Leading and Lagging Indicators
The paired distinction between forward-looking metrics that predict and prevent harm (leading) and outcome metrics that record what has already happened (lagging).
Definition
Leading indicators are proactive, preventive and predictive measures that provide information about the effective performance of safety, health or sustainability activities before incidents occur; lagging indicators measure the occurrence and frequency of past events, such as injury rates, incidents or releases. A sound management system uses leading indicators to drive change and lagging indicators to measure effectiveness (OSHA).
References
OSHA definitions, drive-change vs measure-effectiveness roles
Examples (TRIR, near-misses, audits), Campbell Institute reduction figure
Overview
What it means
Tracking only outcomes is driving by the rear-view mirror: by the time a lagging metric moves, harm has occurred. Leading indicators — near-miss reporting, audit and observation rates, training completion, time to close corrective actions — reveal whether controls are working in time to act. Yet leading indicators alone are unvalidated unless outcomes improve too; the two must be connected.
The distinction generalises beyond safety to environmental management, ESG performance and enterprise risk (cf. key risk indicators).
How it is used
Safety and sustainability teams build balanced metric sets; research cited by the Campbell Institute associates established leading-indicator programmes with substantially lower incident rates, and OSHA actively promotes their adoption.
Why it matters
The pairing turns performance measurement from accounting into prevention — the operational core of any serious safety or sustainability programme.
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