Reporting methodology

Scope
Heijmans’ operations are concentrated in the Netherlands and it reports key figures for these activities in this annual report. Unless specifically mentioned, combined projects have not been included in the non-financial information of this annual report, with the exception of safety-related information, for which Heijmans reports in line with SCC (Dutch: VCA) definitions.

Information gathering and verification
Those involved in preparing the content and design of this report held regular consultations during the year. They organised a kick-off session in September at which they shared experiences from the previous year, together with targets and ambitions. At this session, those involved reached agreements regarding content, ambition and planning. These agreements formed the basis for the underlying report. The data used originate from the various administrations, systems and databases in the Heijmans organisation, including a number of management systems and the registration data on operating processes they produce. Examples include Workday for HRM-related aspects, energy management systems, as well as the likes of IRES for accident statistics. Information is also derived from other sources, such as the ERP systems and information from suppliers, including those supplying the company’s vehicle fleet, timber suppliers, and waste processing and energy companies.

Finally, reporting also includes data originating from the certified management systems ISO 14001, ISO 9001, SCC (Dutch: VCA) and SKAO. Although Heijmans has implemented various procedures for the reporting of incidents and the fact that we have actually received reports of incidents, Heijmans cannot be entirely certain that every incident has been reported.

Reporting methodology
Sustainability-related disclosures have been prepared in accordance with the Global Reporting Initiative (‘with reference’ option). Where possible, Heijmans uses the same terminology used in ISO 26000 and the Integrated Reporting Framework of the International Integrated Reporting Council. The report covers the reporting period 01-01-2022 through 31-12-2022.

Heijmans used the Greenhouse Gas Protocol for the disclosure of CO₂ emissions. Heijmans commissioned EY Accountants LLP to provide limited assurance. Chapters 2, 3, 5, 6, 7.1, 7.2 and 8.4 have been included in the scope of this assurance. The assurance report EY issued has been added to this report.