BACKGROUND

Constructing complex structures, such as buildings, requires the proper installation/assembly of many components. Construction workers needs to properly locate and install/assemble an incredible amount of components, such as beams, pipes, ducts, studs, walls, etc. For example, some complex structures have millions of components that need to be installed with a location accuracy of within an eighth of an inch, or even less in some cases. Unfortunately, the construction process is subject to errors, which can cause significant amounts of re-work and schedule delay. For example, a wall may be installed at a wrong location. If the error is not detected in a timely fashion, a significant amount of re-work may result. A plumber may run water lines through the improperly located wall, an electrician may run electrical wires through the improperly located wall, a carpenter may add sheetrock to the improperly located wall, etc. When the error is detected, the wall may need to be demolished and rebuilt in the proper location in order to rectify the error, and the water lines, electrical wires, sheetrock, etc. may need to be reinstalled. Such errors may cause significant schedule delays and may result in significant additional costs for the construction project. Similar issues exist in the construction of other complex structures, such as airplanes, ships, submarines, space vehicles, etc.

