A construction simulation system (COMsim) with object-oriented modeling elements

Interest in the application of computer simulation in construction has been growing since the introduction of the CYCLONE (CYCLic Operation NEtwork) methodology in 1973. The CYCLONE methodology has become well established and its six standard modeling elements provide a simple, straightforward tool for the study of various construction operations. Many construction-specific simulation systems employ CYCLONE or CYCLONE-like symbols for system modeling. Nevertheless, CYCLONE's simplicity limits its functionality in modeling real world operations. This drawback complicates system modeling and results in ineffective simulations. This study takes advantage of recent developments in object-oriented design to formulate a new simulation system, COMSim (Construction Object-Modeling Simulation), to enhance simulation capability. The idea is to retain the simplicity of construction model building blocks, while enhancing their functionality by introducing object-oriented design. COMSim includes the object module, the simulation module, the GUI module, the DSS module for task duration, and the construction resource database. Case studies of an earthmoving and a material hoist lifting operation are conducted for system validation. Results and findings are reported.