impact of 4d modeling on construction planning process - Chalmers ...

3.3.9 Case study 9 (Jongeling & Ol<strong>of</strong>sson, 2007)
The case study involves construction <strong>of</strong> a cultural centre in Luleå, Sweden. This
building had two underground garages and contained a library and a concert hall. 4D
simulation <strong>of</strong> the building excluding the ro<strong>of</strong> was generated from an existing 3D
model provided by the architect and a Location-based schedule (LBS). This 4D
simulation was run in Common Point 4 Dimensional s<strong>of</strong>tware (CP4D) by importing
the 3D model, the construction schedule and linking them with each other. There were
some problems when simulating the 4D model, for instance, some activities listed in
the schedule cannot be visualized because they were not depicted in the 3D model; or
some activities that instead <strong>of</strong> requiring a presentation <strong>of</strong> ongoing work flow on a
component, they needed ongoing work in a location. To deal with such issue, space
objects were formulated in 3D model for every location consisted in the Locationbased
schedule.
After the simulation <strong>of</strong> 4D <strong>modeling</strong>, some problems <strong>of</strong> construction were detected
which otherwise could not be seen from the Location-based schedule such as space
and resources conflicts. One example issue was presented in Figure 0-18 which made
clear that too many activities were performed at the same time around section I-III. In
this case, the implementation <strong>of</strong> 4D <strong>modeling</strong> provided contractors a visual tool to
identify problems prior to construction and thereby reducing the extra amount <strong>of</strong>
money and human efforts on the work <strong>of</strong> reconstruction.
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