Materials handling operations on construction job sites are error prone and these errors might negatively affect labor productivity. According to a study by the Construction Industry Institute (CII), a set of well organized practices for managing on-site materials would conservatively produce a 6% increase in labor craft productivity. This paper describes a Pilot Test that measured the impact of Global Positioning System (GPS) technologies within materials locating processes on large industrial projects. Those processes were broken down in several steps. A direct comparison of the time traditionally invested in some of those steps and the time required when using GPS clearly determined the time savings associated with the technology. This study also discusses the feasibility of the technology deployment. Finally, the paper analyzes other potential positive impacts derived from GPS.