Multi-LOD 4D Simulation in Phased Rehabilitation Projects

In developing the planning and scheduling of a rehabilitation project in an electrical powerhouse, there are numerous inputs to include in a 4D simulation. 4D simulation is generated by linking a project 3D model with a... [ view full abstract ]

In developing the planning and scheduling of a rehabilitation project in an electrical powerhouse, there are numerous inputs to include in a 4D simulation. 4D simulation is generated by linking a project 3D model with a Precedence Diagramming Method (PDM) schedule. These inputs consider various levels of detail (LODs), such as a very detailed schedule and 3D model to consider the operational constraints, and a less detailed model based on the data of the rehabilitation project itself. This is a normal process considering the rolling wave concept in the planning of a phased project. Since the rehabilitation project involves a large number of workers on a congested and partially operational site, the workers safety is an utmost consideration when developing the 4D simulation. This article details a method used to generate a 4D simulation with adequate LOD for considering operational constraints and safety considerations. This 4D simulation can provide enhanced early decisions about the spatio-temporal criticality of work elements. The proposed method was implemented on a Canadian hydro-electric powerhouse rehabilitation project used as a case study.