Editorial for the themed issue on major and megaproject management

A major project is typically a large-scale investment project costing more than £100 m. A megaproject on the other hand, often considered as a subset of major projects, is typically above US$1 billion. Such projects are not just significant for their cost but often also provide substantial impacts on social, technical, economic, environmental and political (STEEP) dimensions in the short and longer term. They have the ability to transform public services and deliver a robust infrastructure system that can serve generations. Lessons learnt from past projects across the world have identified a need to develop leadership and management capability with regard to management, procurement and law through the life cycle of such large-scale engineering and construction projects.