1. If an enterprise uses its own ERP application on a cloud service under the platform-as-a-service model, what restrictions would there be on when that enterprise may upgrade the ERP system to a new...

1. If an enterprise uses its own ERP application on a cloud service under the platform-as-a-service model, what restrictions would there be on when that enterprise may upgrade the ERP system to a new version?

2. Suppose that a major database vendor offers its database system (e.g., Oracle, SQL Server DB2) as a cloud service. Where would this fit among the cloudservice models? Why?