A Value Stream Mapping-Based Discrete Event Simulation Template For Lean Off-Site Construction Activities

Lean construction is a promising approach for performance improvement in the construction industry. Value stream mapping (VSM) is an essential lean tool for the process improvement of construction activities. However, VSM, regarded as a static pen-and-paper technique, requires repeating the VSM preparation for every improvement alternative. Therefore, dynamism can be introduced into VSM by developing computer simulation models, which is the study's objective. A VSM-based discrete event simulation (DES) template is presented in this paper for off-site construction activities. The model provides a virtual testing environment for the user to decide upon the potential time reduction in non-value-added (NVA) activities for the process improvement. The development and validation of the model is done based on the actual data from a precast production factory. The DES-VSM simulation model assists plant managers with the best possible NVA reduction strategy and accelerates lean implementation in the construction industry.