Planning a construction project through breaking the project down into smaller individual operations of construction processes relies on an accurate estimate of the operational productivity. A model (based on 212 real construction operations) which is capable of producing such estimates is utilised to experiment with operational performance, through varying the number of resources involved in t...

This paper presents research that led to the design and implementation of efficient interference detection methods that can be used to identify and report undesirable conflicts that occur among static (e.g. structure in-place, idle equipment), dynamic (e.g. active machines and workers), and abstract (e.g. hazard spaces) construction resources in 3D animations of discrete-event simulation models...

This paper presents an on-going research on a light-weight 3-dimensional (3D) laser distance and ranging (LADAR) system development at the Peter Kiewit Institute (PKI) in University of Nebraska–Lincoln. The developed LADAR can be readily applied to several construction applications related to automated or robotic tasks, mobile robot navigation, reverse engineering, quality assurance/control, sc...

Emerging wireless sensor networks (WSN) technology offers a great potential in supporting current project management practices. Deploying wireless sensor networks on construction sites can lead to significant time and cost savings by providing accurate and near-real-time data to project management personnel. Continuous monitoring of labor usage, materials placement and equipment performance pro...

Today road construction sites utilize more and more information modeling in design phases as well as model based 3-D machine control systems in site operations. For main contractor, the management and control of all the site operations is a demanding task including also many challenges created by continuously developing new technology. In the paper, the main requirements for successful dynamic ...

This Bulletin is part of OJJDP’s Juvenile Accountability Incentive Block Grants (JAIBG) Best Practices Series. The basic premise underlying the JAIBG program, initially funded in fiscal year 1998, is that young people who violate the law need to be held accountable for their offenses if society is to improve the quality of life in the Nation’s communities. Holding a juvenile offender “accountab...

The author points out that the existing simulation systems cannot represent precisely the ill-structured logic in construction operations without if-then representation. He also discusses the methodologies of system simulation which are based on artificial intelligence methods. The author then presents a prototype system developed of the simulation system, and shows an example of simulation mod...