Site layouts are used by site personnel as a guideline for the location
of objects as they arrive on the site. 2D blueprints are still the most common form of representation of site layouts. In a layout generated with the
dynamic approach, multiple objects may use the same space on the site at
different points of time. Accordingly, if all the objects are presented in
a single 2D document, they could appear to have space overlaps
(see Fig. 4c) — which can be confusing for the day-to-day operations of
the site. The reason behind this illusory overlap is, obviously, that the
4D space of site layout (2D or 3D physical dimensions + time) is
represented in a 2D space of a plane. To avoid such confusions and
make the reading of dynamic site layouts more clear, an algorithm is
proposed for representing 4D dynamic layouts in a minimum number
of overlap-free 2D drawings. This section first explains the reason behind
this confusion from geometric perspective, then explains the proposed
algorithm, and demonstrates its advantage over the previous approaches
through a numerical example.