The interviews confirm that traditional Design–Bid–Build (DBB) under NZS 3910 still dominates New Zealand’s procurement landscape. Clients remain highly risk-averse, often pushing risks such as geotechnical uncertainties, design flaws, or site conditions down to contractors. This aligns with international research showing that transactional procurement models often misallocate risk, leading to inefficiencies, disputes, and underperformance (Flyvbjerg et al., 2004; Buganova & Simickova, 2019).
P3 and P5 described how poor documentation and lump-sum contracts create significant vulnerabilities, particularly for SMEs. Literature underscores that this is unsustainable: Ng & Loosemore (2007) argue that transferring risks without considering the receiving party’s capacity leads to inflated costs and disputes. The insolvency wave in New Zealand’s construction sector further validates this risk misalignment.
Discussion: The persistence of NZS 3910 reflects institutional inertia and political preference for apparent cost certainty. Yet, the evidence shows this approach increases systemic fragility. Literature and interviews converge on the need for more straightforward risk allocation guidelines where responsibility is borne by the party best able to manage or prevent the risk (OECD, 2023).
Disclaimer: The results presented here are based on ongoing research and are subject to change upon the finalisation of the full research report.