"Megaprojects"-defined as projects with budgets exceeding $1 billion -are important contributors to numerous sectors, including health care, defense, mining, telecommunications, transport, energy and water infrastructure, sporting events, science, and manufacturing. They represent a significant proportion of many nations'economic activity and profoundly affect productivity, social cohesion, and the environment. Yet megaprojects have proved notoriously difficult to deliver on time and on budget; one estimate suggests that 90% of them end up over budget. Based on more than 10 years of research into a number of megaprojects in London, including the infrastructure for the London 2012 Olympics and the construction of two new terminals at Heathrow Airport, the authors conclude that one way to manage the uncertainties inherent in megaprojects is to innovate throughout the course of the project. What's more, they argue that their suggestions are applicable to all large-scale, long-term projects -not just projects with billon-dollar budgets.

This is an MIT Sloan Management Review article.