Rhie, Jeseop ; Jang, Minseo ; Kim, Hojin ; Lee, Seungwoo ; Shin, Do Hyoung
https://dx.doi.org/10.6106/KJCEM.2025.26.2.052
In construction projects, inefficient resource fluctuations can lead to hiring, firing and rehiring of resources, or cause idle time, thereby incurring additional costs. Reducing such fluctuations is a critical task in resource leveling, and various studies have employed Release and Re-Hire (RRH) and Resource Idle Days (RID) as evaluation metrics. However, in multiple resources leveling, it is necessary to comprehensively consider both the inefficient fluctuations and costs of each resource, yet research in this area remains insufficient. This study proposes a cost-based multiple resources leveling model that applies weights according to the unit costs incurred by RRH or RID for each resource, aiming to reduce both RRH or RID and the associated costs simultaneously. To validate the model, the proposed model was applied to a cost-based multiple resources leveling system using a genetic algorithm, and multiple resources leveling...