The governance and evaluation of megaprojects that is, large-scale, complex, high-stakes infrastructure projects usually commissioned by governments and delivered through partnerships between public and private organisations is receiving increased attention. However, megaproject evaluation has hitherto largely adopted a linear-rationalist perspective to explain the frequent failure of such projects to meet the iron triangle of performance criteria: delivering on time, within budget, and according to specifications. This approach recommends greater control and accountability to remedy...