How to evaluate safety data: Metrics that illuminate
Are you missing two simple indicators that could shed light on potential risks in your operations?
The right metrics help determine the effectiveness of your safety strategies. Two common indicators are lagging and leading.
Typically, companies use a combination of the two, since there is no single measurement that offers a clear vision of their safety endeavors.
What is a lagging indicator?
A lagging indicator uses information or data following a safety event. In other words, it’s a study of the company’s failures and often called a reactive approach to safety.
Lagging indicators used by a typical motor carrier include:
- Number of injuries and fatalities,
- Lost work time,
- Number and severity of commercial motor vehicle crashes,
- Number of workplace safety or DOT citations,
- Number of near misses, and
- Workers’ Compensation claims.
If you use injury and illness statistics for workplace safety data, they do serve an important function. But be aware that there are some pitfalls to relying solely on these statistics. Consider the following drawbacks:
- Under-reporting may not give you the complete picture.
- An injury may not reflect whether the risk is under control.
- Injury rates don’t always tell the whole story. The same risk might result in minor injury for one worker and a more serious injury for another.
- A low injury or illness rate might lead one to believe that no major safety risks are present and create a spirit of complacency.
- Injury rates identify outcomes, not causes.
What makes an indicator leading?
While lagging indicators look to past behaviors, a leading indicator method focuses on fostering future safety behaviors. It’s often called the proactive approach.
The proactive approach:
- Tracks improvements,
- Measures successes,
- Asks for feedback within the company,
- Encourages problem-solving skills,
- Communicates goals on improvement, and
- Looks at the impact of these changes.
Managers look at leading indicators with a goal of steadily improving safety. Leading indicators that show whether a motor carrier has improved safety might include:
- Results of scheduled self-audits and inspections,
- The number of employees trained versus the goal,
- The number of safety improvements initiated and completed versus the company’s objectives,
- Results of a risk or hazard assessment, and
- The results of a documented job hazard analyses.
See the full spectrum
To see if a safety program is working properly, a company’s metrics should include both leading and lagging indicators. Both indicators are necessary to measure success.
Suppose you met your goal of 100 percent of your drivers taking a refresher course on hours of service. You still need to examine your roadside inspection reports and in-house log-auditing to see if it had an impact on performance.
If the leading indicator of the training goal shows success, but the other leading indicator (log-auditing) and the lagging indicator (roadside inspection violations) don’t, the company should find the root cause and try again. Maybe the information presented during the training was not clear and the drivers left confused. You may need to revisit the topic with the drivers and, again, measure its success through both types of indicators.
It comes down to is a series of checks and balances and never relying solely on one metric or category of measure.
Key to remember: Avoid fumbling in the dark when it comes to your safety metrics. Both lagging and leading indicators help shed light on where your program is succeeding and where it needs improvement.