213 influence, uptake, or recognition differs from assessing effectiveness in the stricter sense of determining whether participation leads to measurable and attributable improvements in practices or conditions. 1.3 Toward an Integrated Definition and Measurement Framework Given the diversity of definitions of VSS in the academic literature and the varied practices adopted by standards in assessing their own impact, there is a need for a more integrated and operational definition of effectiveness, accompanied by a feasible approach to its measurement. This study proposes that effectiveness can be understood as comprising three interrelated dimensions. First, a VSS must demonstrate uptake within the industry. Participation by companies or facilities constitutes a necessary precondition for effectiveness. Without adoption, even a well-designed standard cannot generate meaningful influence or change. Uptake, therefore, represents the foundational condition upon which further dimensions of effectiveness depend. Second, beyond participation, a VSS should demonstrate that its participants meet the requirements set out by the standard. This dimension concerns alignment and compliance with defined criteria. In practice, such alignment is often verified through assurance mechanisms, particularly when third-party verification is required. Where credible assurance systems are in place, a VSS can reasonably demonstrate that participating entities fulfill the management and performance requirements established by the standard. Third, and most critically, effectiveness should encompass demonstrable improvement in the behavior or performance of participating entities. This dimension moves beyond formal compliance to examine whether participation is associated with positive change. Such change may be assessed from a longitudinal perspective, by comparing performance before and after adoption, or from a cross-sectional perspective, by comparing participating entities with nonparticipating industry peers. Either approach seeks to capture whether the VSS contributes to measurable differences in practices or outcomes. Corresponding to these three dimensions, this paper proposes a structured measurement approach. Uptake can be assessed through participation data, which are generally observable and comparatively straightforward to track. Alignment with requirements can be evaluated through assurance processes and documented verification results. The third dimension, behavioral or performance change, presents the greatest methodological challenge due to both institutional and informational constraints. Institutional constraints arise from the complex organizational structures that characterize the mining and minerals sector. Participating entities may be products, facilities, or companies, each embedded within multi-layered corporate arrangements. Products may pass through multiple facilities; facilities may operate under parent companies; and certification may
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