Since the water blockage problem could be associated with several parties, AOT should take the initiative in requesting all involved parties (including PMC, the Designer, Supervision Consultants and the contractors) to participate in solving the problems together. AOT management with vast experience in managing several airports within Thailand, should have the ability to lead the investigation and remedial measures, this approach will accelerate the fact finding process and the implementation of the dewatering and pavement repair schemes. By appointing a new investigation consultant with minimum knowledge in this airport construction, the investigation process will be slow, and the cooperation from involved parties would also be limited.