The literature lacks a single and universally accepted definition of major and megaprojects: usually, these projects are described as projects with a budget above $1 billion and a high level of innovation, complexity and uniqueness both in terms of physical infrastructure and stakeholder...

Nuclear Decommissioning Projects and Programmes (NDPs) are jeopardized by several risks, long schedule and costs estimates that lay in the range of hundreds of billions of pounds. Moreover, in some countries, these estimates keep increasing and key stakeholders have a limited understanding of...