A simulation-based approach for systematic analysis of workflow during the construction of in-situ concrete frames

Abstract: The construction workflow of in-situ concrete frames in multi-storey residential buildings is highly complex and dynamic. Discrete-event simulation (DES) offers capabilities to model and analyse such complexity. Although DES has successfully been used by researchers in a wide range of construction-related applications there are not many examples demonstrating how different simulation outputs (time, cost, queue waiting time, resource usage) could be used in an integrated and systematic way to facilitate in-depth analysis of construction workflow. This report presents a simulation model of concrete framework construction and demonstrates how it can be used for systematic analysis of a production setup using multiple performance indicators such as construction time, cost, resource utilization, and workflow waiting times. It was found that the proposed model can describe the complexity in construction workflow and support systematic analyses. Multiple simulation measures were also found valuable, e.g. in order to identify and remove bottlenecks. This research has been financially supported by the Swedish National Board of Housing, Building and Planning (Boverket), the Swedish construction industry's organization for research and development (SBUF), and Cementa AB. Several concrete manufacturers and contractor companies are also kindly acknowledged for their involvement and collaboration during this research project. The authors would also thank Jonas Enhörning at Duke Systems AB for technical support related to ExtendSim.