SUMMARY
This research works objectives were to conduct a work study of subbase course of road construction and implement productivity analysis with EZStrobe simulation system. The study had divided construction process into 3 parts. Each part of the process was simulated with EZStrobe to find optimum construction team members with minimum unit cost. These optimum team members were used in simulation model of each part to determine basic time with 95% confident interval and 5% limit of error. Then, the standard time and productivity of each construction team was calculated in various units; production per hour (cu.m./hr., sq.m./hr.), daily production (cu.m./day, sq.m./day, m. of road/day), and number of hour required per section of subbase course construction (200 m. in length). After that, the overall process simulation model including Part 1 to Part 3 was created, representing for all 26 sections of subbase course construction. The analysis results showed that optimum team combination of Team1, Team2 and Team3 for the minimum unit cost of subbase construction was 2-1-2; and for the minimum duration of construction was 3-2-3. The outcomes of this research pointed out that, with EZStrobe simulation system, the productivity management could be done effectively by conducting work study at project site and simulating for alternative resources management plan to determine for optimum construction teams according to the desired project goals.