Scenarios that describe concrete behaviors of software play an important role in software development and especially in requirements engineering. Scenario details should vary in content when described from different viewpoints. In such a case, scenarios from different viewpoints may result in inconsistencies. It is hard to detect the inconsistency between scenarios automatically, when scenarios are described informally. Furthermore, scenarios are evolutionary, and it will require a great deal of labor to evolve each scenario. This paper presents an integration method to detect the inconsistency between scenarios from different viewpoints and to provide support for scenario evolution by generating new scenarios from an integrated scenario. We illustrate them using the example of program chair?s job.