Changing Scheduling Purposes and Evolving 4D-CAD Models: A Study of Planning and Realization in a Utility Project

摘要

This research explores scheduling purposes and related 4D-CAD requirements during planning and realization of a 900m sewer line construction project. We used an ethnographic-action research approach to investigate how changing scheduling purposes influence 4D-model setup. To this end, we implemented 4D-CAD in a real-life setting, iteratively improved the model, and observed how it was used by practitioners. Observations show that in the planning stage scheduling concentrates on task identification, resource allocation and stakeholder communication, while jobsite scheduling focuses more on operational task dependencies, delay mitigation and site logistics. These changed purposes eventually impact required detail and focus of 4D-CAD models.