This involved testing, on a sample basis, the measurement, collection, aggregation and reporting of selected sustainability information at each operation. — Inspection and corroboration of supporting evidence to evaluate the data generation and reporting processes against the assurance criteria. — Reporting the assurance observations to management as they arose to provide an opportunity for corrective action prior to completion of the assurance process. — Assessing the presentation of information relevant to the scope of work in the Report to ensure consistency with the assurance observations.