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Health and safety management system audit reliability pilot project
D T Dyjack1, C F Redinger, R S Ridge
1Department of Environmental and Occupational Health, School of Public Health, Loma Linda University, Loma Linda, CA 92350, USA.
Summary
This study found low reliability in occupational health and safety (OHS) management system audits. Improvements are needed for the audit instrument and process to ensure consistent findings.
Area of Science:
- Occupational Health and Safety
- Industrial Hygiene
- Management Systems Auditing
Background:
- Reliability of audit findings is crucial for effective Occupational Health and Safety (OHS) management systems.
- Existing OHS assessment instruments require rigorous evaluation to ensure consistent application.
Purpose of the Study:
- To assess the reliability of audit findings from an OHS management system assessment instrument.
- To evaluate both consistency and agreement between auditors using a modified test-retest method.
Main Methods:
- Conducted four 1-day OHS management system audits in diverse organizational settings.
- Utilized a publicly available OHS assessment instrument with 102 auditable clauses and a 6-point scale.
- Employed Pearson correlations and t-tests to analyze auditor consistency and agreement, alongside intraclass correlation coefficients.
Main Results:
- Overall site score correlations were low (0.206–0.543), indicating poor consistency.
- Significant differences in aggregate mean scores were found at two of four sites.
- Intraclass correlation coefficients failed to meet minimum agreement requirements, highlighting reliability issues.
Conclusions:
- The current OHS management system audit instrument and process exhibit low reliability.
- Opportunities exist to enhance the instrument's design and the audit methodology.
- Further research should investigate OHS and environmental management system audits in governmental and commercial sectors.
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