What Is a Power Interest Matrix

Understanding the Role of the Power Interest Matrix in Stakeholder Analysis and ISO 45001 Compliance

Updated March 2025

A Power Interest Matrix is a strategic stakeholder analysis tool used to categorise stakeholders based on their level of power (influence) and interest (concern or involvement) in an activity, project, or system. It supports targeted engagement strategies and efficient communication planning in organisational and safety management.

The matrix is especially valuable in ISO 45001-compliant Occupational Health & Safety (OH&S) systems, where stakeholder expectations, roles, and levels of involvement must be regularly assessed and aligned with safety objectives.

How the Power Interest Matrix Works

The matrix is structured as a four-quadrant grid, plotting stakeholders along two axes: Power (ability to influence outcomes) and Interest (level of concern or involvement). Each quadrant defines a strategy:

Why Use a Power Interest Matrix?

The Power Interest Matrix enables organisations to tailor their stakeholder engagement strategies and focus efforts where they will deliver the most value. It is commonly used in:

When integrated into a MOVER Framework or an Onion Diagram approach, the Power-Interest Matrix strengthens systems thinking and helps visualise stakeholder dynamics over time.

To classify stakeholders based on their ability to influence and their interest level, allowing for prioritised and effective stakeholder management.

While ISO 45001 does not mandate specific tools, it requires understanding stakeholder needs and expectations. The Power Interest Matrix supports compliance by enabling structured stakeholder assessment.

It complements tools like the Onion Diagram or PESTLE Analysis. While this tool focuses on influence and concern, others explore stakeholder proximity, external context, or functional roles.