Most ontologies are being developed in an engineering-oriented method: a small group of engineers
carefully builds and maintains a presentation of their view of the world. Certainly, there are several tools oriented towards collaborative work: a consensus-building mechanism that allows a large group of people to contribute or annotate a common ontology in a collaborative way to reach consensus among individuals. However, the previous approaches have not yet exploited the most important problem in consensusbased collaboration, when can we get a consensus? The main goal of this research is to investigate an effective methodology for collaborative ontology building in which we apply consensus quality and susceptible to consensus to reach to the final version of the collaborative ontology building.