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Dynamic Planning and Control of Civil Infrastructure Systems
Pages 31-39

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From page 33...
... The impact of such unbalanced interactions is greater in concurrent construction, a technique widely used in modern construction projects and a critical capability for returning infrastructure to service after a major disaster. In this paper, I will present a strategy for simulationbased reliability buffering that can contribute to more robust construction plans, reduce uncertainties, and mitigate the impact of changes.
From page 34...
... Moreover, with a dynamic buffering process, the initial size and location of a reliability buffer can be changed at any time during the construction, which might also change the initial precedence relationships. FOCUSING ON FEEDBACK Successful reliability buffering requires paying attention to feedback processes, which contribute to indirect and/or unanticipated events during a project and make the construction process dynamic and unstable.
From page 35...
... CAPTURING CONSTRUCTION DYNAMICS Dynamics should be captured in the construction schedule. Factors that trigger feedbacks in construction are changes, dependencies among activities, construction charactenstics, and human responses to the work environment and policies.
From page 36...
... Sometimes, by adopting managerial changes, rework on problematic tasks that would require more resources can be avoided. However, even these changes can lead to subsequent changes that might have more of a negative impact on construction performance than the rework option.
From page 38...
... Systematically and strategically located and sized time buffers can help reduce the domino effect of changes on downstream work by effectively controlling the start time and progress of the downstream work. CONCLUSIONS Reliability buffering is an effective technique for more robust construction planning and for addressing inherent uncertainties and the impact of intended and unintended changes.
From page 39...
... 2001. Dynamic Planning and Control Methodology for Large-Scale Concurrent Construction Projects.


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