Logic-Based Approach for Evaluating Change Impacts

As the complexity of a construction project increases, the occurrence of changes becomes unavoidable. In addition to the direct impact, a change may also have consequential impact (ripple effect) on the performance of project duration and cost. Built on a schedule network, this paper proposes a model, called LOGIC that uses a logic-based (including hard logic, soft logic, and causal logic) approach to quantitatively capture the consequential impact. In the paper, an example is used to demonstrate the strengths of the model. Strategies of computer implementation and recommendation for future work are also provided.