During a design process the risk profile of a project continuously evolves. Often a project progresses through a diamond shaped risk envelope. The initial concept is simple, but during the engineering process several risks are defined and mitigated, making the design increasingly complex. With additional investigations and calculations, some of the identified risks can be better defined. As a result, the design should evolve into a matured design in which only a few risks remain. These risks should be manageable. If uncontrollable risks remain, even though the chance of occurrence may be small, this could render the project unfeasible. This paper will show how the risk profile of a bridge foundation adaptation has evolved.
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