The aerospace, IT, and construction industries have seen a significant shift over the past few years from "cost-plus" contracts (where "every change is good", and means more revenue), toward "fixed-price" or "ceiling value" contracts (where the cost of every change must be negotiated with the customer or traded off against other work). The disruptive effects of these changes are substantial, but are universally poorly (and under-) estimated. The result has been unexpected cost overruns, lost profits, and disputes. This workshop will combine lecture and group exercise to teach valuable lessons about project disruption dynamics. In the session you will learn how change impacts spread to disrupt a project's performance and learn some mitigations to reduce or avoid the disruptive impacts of changes. For further information please contact Tom Kelly at