Article 4/4 — Safety: KPIs for Measuring Safety
1. Why do we need to measure safety?
In construction project management, safety cannot be managed by gut feeling. Without measurement, statements such as “our site is safe”, “we have no accidents”, or “we take safety seriously” are easily reduced to slogans.
Measuring safety helps you to:
- Know whether the safety system is truly working or only exists on paper.
- Identify weak points and bottlenecks for continuous improvement.
- Translate safety responsibilities into concrete indicators for each function and role.
- Build a sustainable safety culture that does not depend solely on individual goodwill.
2. Four common groups of safety KPIs
In construction, based on international practice and lessons learned from real projects, safety KPIs are commonly grouped into four categories: Lagging, Leading, Compliance, and Cultural.
2.1. Lagging KPIs — Outcome indicators
These indicators reflect outcomes that have already happened, usually related to incidents and accidents.
Examples include:
- Number of days without lost-time injury (LTI free days).
- Number of lost-time injuries (LTIs).
- Accident rate per 200,000 working hours.
Strength: they are simple, intuitive, and easy to report. Limitation: they only show consequences and do not prevent incidents if you rely on them alone.
2.2. Leading KPIs — Preventive activity indicators
These indicators measure activities that generate safety and are strongly preventive in nature.
Examples include:
- Number of safety or toolbox meetings conducted per week.
- Number of preventive actions implemented after risk assessments (JSAs).
- Percentage of workers who receive safety induction training before entering the site.
This is a critical group of KPIs that project managers should review weekly, as it determines the quality of “inputs” to the safety system.
2.3. Compliance KPIs — Process adherence indicators
This group reflects the level of adherence to safety procedures, rules, and standards.
Examples include:
- Percentage of workers using PPE correctly and consistently.
- Percentage of high-risk activities with approved Permits to Work (PTW) before execution.
- Number of JSAs prepared and approved on time.
When compliance indicators are low, accidents are usually just a matter of time. This group of KPIs shows the gap between paper procedures and actual site practice.
2.4. Cultural KPIs — Safety culture indicators
Cultural KPIs reflect how proactive people are in protecting themselves and their colleagues.
Examples include:
- Number of near-miss reports submitted.
- Number of safety improvement suggestions initiated by workers.
- Participation rate in safety training sessions and campaigns.
When the number of near-miss reports increases, it does not necessarily mean the site is more dangerous. More often, it is a sign that the safety culture is improving: people dare to speak up, raise concerns, and help the team improve.
3. Additional advanced safety KPIs
Depending on project size and client requirements, you can add more advanced safety KPIs for a more comprehensive view:
- Total safe man-hours accumulated during the reporting period.
- Percentage of site inspections carried out at the prescribed frequency.
- Number of PPE violations detected and immediately corrected on site.
- Number of hazards eliminated before any incident or accident occurs.
- Completion rate of mandatory and refresher safety training sessions.
When properly designed, these indicators help transform safety from a “mandatory cost” into “operational performance” and a genuine competitive advantage for the contractor.
4. Designing safety KPIs using the SMART principle
For safety KPIs to be truly useful, each indicator should follow the SMART principle: Specific – Measurable – Achievable – Relevant – Time-bound.
| Letter | Meaning | Example of a safety KPI |
|---|---|---|
| S – Specific | Clear and precise, not vague. | 100% of workers entering the site receive initial safety induction training. |
| M – Measurable | Can be quantified with numbers. | At least three toolbox meetings per week per construction team. |
| A – Achievable | Realistic and attainable with current resources. | Reduce PPE violations by 20% within three months, instead of targeting “zero violation” immediately when the system is not yet mature. |
| R – Relevant | Directly linked to the project’s safety objectives. | KPIs assigned to construction teams (PPE use, near-miss reporting) that are closely related to their daily work, not distant corporate metrics. |
| T – Time-bound | Bound to a clear time frame. | Review and consolidate safety KPIs at the end of every week, with monthly and quarterly roll-ups. |
A good KPI set should be challenging enough to stretch the system, yet realistic enough for frontline teams to commit and maintain over time.
5. Tracking and reporting safety KPIs
For safety KPIs to create real impact, you need a clear tracking and reporting mechanism:
- Define a regular reporting rhythm: weekly, monthly, quarterly, aligned with safety coordination meetings.
- Ensure transparency of data, supported by photos, site reports, and inspection records.
- Compare planned versus actual performance, then define specific improvement actions.
- Use KPIs as a tool to ask “Why?” and “How do we improve?” — not just as numbers to criticize people and close the meeting.
A strong project manager does not simply say “my site is safe” — they can demonstrate it with well-managed safety indicators over time.
6. Using KPIs to reinforce safety culture
When applied correctly, KPIs will not create negative pressure but instead become a backbone for building safety culture:
- Encourage reporting of near-misses and hazards, without punishing people who tell the truth.
- Provide timely feedback when unsafe behavior is observed, linked to on-the-spot coaching.
- Recognize and reward teams and individuals with strong safety performance.
- Integrate safety KPIs into performance evaluation, incentives, and career development.
Safety becomes sustainable when every worker feels proud to comply, rather than merely going through the motions to avoid being blamed.
7. Conclusion of the 4-article Safety series
Throughout this 4-article series, we moved from a specific accident case, to the risk matrix, to the pillars of safety management, and finally to the KPI system. Together, they form a complete picture of safety management:
- Right awareness of risks and consequences.
- Tools and processes for identifying and controlling risks.
- Correct actions on site, repeated every day.
- A clear and transparent KPI system with named owners.
When these four elements are connected, safety becomes part of the company’s DNA and a foundation for delivering projects in a professional and sustainable way.
If you find this content useful, please share it with your colleagues, partners, and project teams so we can jointly raise safety standards in the construction industry. Every comment or suggestion you send us is a valuable lesson that helps INDUSVINA improve our future articles and materials.
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