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  • Writer's pictureAgnes Sopel

Unpacking the PDCA Model & ISO 45001: A Comprehensive Guide to Continual Improvement


The PDCA (Plan-Do-Check-Act) model is a globally acknowledged methodology for fostering continual improvement, and it's fundamentally embedded within ISO standards. This model is instrumental in ensuring consistent quality, evaluating effectiveness, and underpinning the continuous enhancement of Health and Safety (H&S) activities.


1. The Four Pillars of PDCA:

  1. Plan: This phase involves assessing risks and opportunities, defining objectives, and developing a structured roadmap to success. Key elements include emergency response for ISO45001, change control and management, and adherence to legal obligations.

  2. Do: Here, we implement processes, assess risks to workers, prioritize, allocate resources, and foster clear communication paths involving all stakeholders.

  3. Check: This pivotal step enables monitoring and measuring, investigating incidents, determining causes, and ensuring risks are well-controlled.

  4. Act: The final phase encompasses performance reviews, audits, inspections, updating plans, and strategizing for continual improvement.

2. Delving Deeper: Planning and Support

  • Intelligent Structure: A robust plan is characterized by a well-defined structure, accurate risk identification, legal consideration, action plans, and objective setting. Recognizing potential blockages and managing risks are essential for achieving outstanding performance.

  • Support: The compass guiding us is the policy set in this phase. Clear communication routes, updated documentation, resource allocation, competence building, awareness, and risk mitigation are all addressed, establishing a foundation for a safe workplace.

3. Operational Excellence and Performance Evaluation:

  • Operation: The execution of plans, alignment with objectives, change management, and dealing with unforeseen risks all occur in this phase. The emphasis is on controlling outsourcing and maintaining seamless interactions with suppliers and contractors.

  • Performance Evaluation: This health check includes monitoring, measurement, internal audits, and management review, allowing for a thorough assessment of the system's effectiveness.

4. Annex SL and ISO 45001 Clauses:

Annex SL provides a consistent structure across all standards, making it user-friendly with a clear separation between forecasting and review processes. Let’s explore the pivotal clauses of ISO 45001:

  • Clause 1 – Scope: Outlines the intended outcomes as a framework for H&S to prevent worker-related injury and illness.

  • Clause 2 – Normative References: Provides a list of applicable standards, though none are directly linked with ISO 45001.

  • Clause 3 – Terms and Definitions: Clarifies terminology used throughout the standard.

  • Clause 4 – Context: Addresses unique attributes and their impact on the H&S system, aligning with the strategic direction for effectiveness. This includes understanding the context, needs and expectations, scope, and management system improvement.

  • Clause 5 – Leadership and Worker Participation: Emphasizes leadership, commitment, policy, and defining roles and responsibilities.

  • Clause 6 – Planning: Focuses on actions to address risks and opportunities, setting and achieving objectives.

  • Clause 7 – Support: Addresses resources, competence, awareness, communication, and documented information to meet goals.

  • Clause 8 – Operation: Discusses operational planning, change management, and dealing with unexpected events and risks.

  • Clause 9 – Performance Evaluation: Involves monitoring, measurement, analysis, evaluation, internal audits, and management review.

  • Clause 10 – Improvement: Concentrates on addressing non-conformity, corrective action, and continual improvement.

5. Conclusion:


ISO 45001, with its emphasis on the PDCA model, serves as a strategic guide for managing risks and ensuring optimal safety. It is adaptable, applicable across sectors, and places worker safety at the forefront. The standard allows for proactive risk management, communication of hazards, development of safety protocols, and continuous improvement, thereby ensuring a safer, healthier workplace for all.

By thoroughly understanding each clause and the comprehensive structure of ISO 45001, organizations can leverage this knowledge to build robust H&S management systems and drive continual improvement, thereby fostering a culture of safety and well-being.



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