Abstract
‘The asynchronous distributed type consentaneous opinion making system’ and ‘The project visualization system by way of the Virtual Model (VM)’ have been studied and developed by the authors. Combining of these systems, we would propose a system called ‘Opinion collective type work planning system’ for the purpose of optimizing the construction process. Then, the usefulness and some points to improve will be pointed out by a experimental use of this system in the construction of the Hakkagawa water gate.