What Is a Safe Method Variation

Understanding How Task Deviations Reveal Risk, Resilience, and Safety Insights

Updated March 2025

A Safe Method Variation (SMV) is a deviation observed between the approved or expected safe method of work and the actual method used on the ground. These variations are not always negative—in fact, they often reveal ways in which frontline teams adapt processes to improve safety, efficiency, or both.

SMVs provide critical insights into the real-world execution of safety procedures and help organisations bridge the gap between formal work instructions and practical operations. In ISO 45001-compliant Occupational Health & Safety (OH&S) systems, SMVs support Clause 10.2 on corrective actions and continuous improvement.

Origins of the SMV Approach

The concept of SMVs was first introduced within the Safety Events Tracker by SafetyRatios. It provides safety inspectors with a structured way to assess whether a task, as performed, aligns with or diverges from approved safety methods.

Unlike traditional inspections that focus only on compliance, the SMV approach acknowledges the natural adaptations workers make— often in response to constraints, obstacles, or efficiencies not foreseen in the original plan.

Categories of Safe Method Variations

Not all deviations are the same. Safe Method Variations are classified based on the impact on safety and operational performance:

Why Safe Method Variations Matter

SMVs allow organisations to continuously learn and adapt. Rather than viewing deviations as failures, they are used to:

This approach is especially powerful when used alongside Planned Task Observations (PTOs), where inspectors observe an entire task flow to compare planned versus actual methods. Together, PTOs and SMVs help safety teams shift from reactive enforcement to proactive learning.

SMVs and ISO 45001

ISO 45001 encourages continuous improvement based on operational feedback. SMVs are one way to implement this principle, aligning directly with:

By documenting SMVs and analysing their patterns, organisations can turn informal adjustments into formal safety improvements, reducing blind spots in their OH&S systems.

A Safe Method Variation is when the actual way a task is done differs from the approved safe method. The variation may be positive (safer or more efficient) or negative (less safe or less reliable).

Analysing SMVs helps improve safety systems by identifying what workers are doing differently—and why. It can reveal risks, training gaps, or improvements worth adopting.

No. Not all SMVs are unsafe or non-compliant. Some reflect improvements that were never documented. The goal is to understand the variation, assess the impact, and respond accordingly.

SMVs support ISO 45001 by enhancing hazard identification (Clause 6.1), engaging workers (Clause 5.4), and enabling continuous improvement (Clause 10.2). They are a practical expression of the system’s intent.