The diversities of contractual terms in construction projects leads to a diversified contractual interpretation in one project. In the long term, the contractual discrepancies would resulted the project suffered from the unwavering disputes. Given the circumstances of site valuation, which refers to the evaluation on the quantity of the building feature was hardly to be quantified in the exact amount based on contractor’s work done. Often, the site evaluation dissatisfactions occurred when the quantity elements in the railway construction has been over claimed by the contractor due to accuracy onsite inspection. The mega structure construction projects have the complicated site inspection and real time measuring tabulation. As fatality increase on site, due to risking human life on the field. The safety culture in mega structure construction has been considered taken lightly. Recently, the advance technology has offered new whole idea in implementing site measurement without risking man, which is using the application of technology that enable Building Information Modelling (BIM) as analyzing tool to process as built drawing. Thus, this research aims to identify the effectiveness utilization of Building Information Modelling (BIM) in measuring real time in railway construction industry.