Discussion of “Building Project Model Support for Automated Labor Monitoring” by R. Sacks, R. Navon, and E. Goldschmidt

摘要: The critical-path method (CPM), commonly used for building project planning and control in practice, falls short of resource space considerations. Consequently, seasoned site managers have been informally relying on judgment, intuition, experience to mentally coordinate the work requirements with use CPM produced bar-chart schedules. authors presented a product/process integrated object oriented model (referred as “building model” paper) an effort seamlessly blend space, resource, time, activity, elements into generic managing projects. state-of-the art modeling consists 4D (i.e., 3D CAD plus time) (Koo Fischer 2000), simulation (AbouRizk Mather virtual reality enhanced (Kamat Martinez 2001). At present, requirement abundant, consistent, accurate data has recognized by many major challenge advancing research application process/product construction. Hence, what indeed makes authors’ outstanding is its companion global positioning system (GPS) automated collection construction operations data. GPSbased described paper was able achieve accuracy “arm’s length” 1–2 m) fixing locations within environment. made important point that following certain rules, GPS-collected raw could be postprocessed at “activity” level or even more refined “basic element” (e.g., time worker spent particular column adjacent wall one floor, respectively). With 20 years development, current stand-alone GPS can provide positions around 10 m. 1 2 m achieved technology differencing (DGPS), which uses second receiver located fixed known applies differential corrections observations from mobile receiver. existing civilian technologies appear key overcoming “data” obstacle making sophisticated models This may represent significant