TY  - JOUR
A1  - El-Rayes, Khaled
A1  - Hyari, Khalied
T1  - A Multi-objective Model for Optimizing Construction Planning of Repetitive Infrastructure Projects
N2  - This paper presents the development of a model for optimizing resource utilization in repetitive infrastructure projects. The model provides the capability of simultaneous minimization of both project duration and work interruptions for construction crews. The model provides in a single run, a set of nondominated solutions that represent the tradeoff between these two objectives. The model incorporates a multiobjective genetic algorithm and scheduling algorithm. The model initially generates a randomly selected set of solutions that evolves to a near optimal set of tradeoff solutions in subsequent generations. Each solution represents a unique scheduling solution that is associated with certain project duration and a number of interruption days for utilized construction crews. As such, the model provides project planners with alternative schedules along with their expected duration and resource utilization efficiency.
KW  - Mehragentensystem
KW  - Lernendes System
KW  - Infrastruktur
Y1  - 2004
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-2135
ER  - 
TY  - CHAP
A1  - El-Rayes, Khaled
A1  - Kandil, Amr
T1  - Distributed Computing for the Optimization of Large-Scale Construction Projects
N2  - Available construction time-cost trade-off analysis models can be used to generate trade-offs between these two important objectives, however, their application is limited in large-scale construction projects due to their impractical computational requirements. This paper presents the development of a scalable and multi-objective genetic algorithm that provides the capability of simultaneously optimizing construction time and cost large-scale construction projects. The genetic algorithm was implemented in a distributed computing environment that utilizes a recent standard for parallel and distributed programming called the message passing interface (MPI). The performance of the model is evaluated using a set of measures of performance and the results demonstrate the capability of the present model in significantly reducing the computational time required to optimize large-scale construction projects.
KW  - Baubetrieb
KW  - Computerunterstütztes Verfahren
KW  - Verteiltes System
KW  - Planung
KW  - Großbaustelle
KW  - Optimal Planning
Y1  - 2004
U6  - http://nbn-resolving.de/urn/resolver.pl?urn:nbn:de:gbv:wim2-20111215-1601
ER  -