PerformancePoint and Enterprise Reporting both embed within the Microsoft SharePoint portal to provide the single interface for the users.

Microsoft Performance Management allows the customer to monitor, analyze, and plan their business as well as drive alignment, accountability, and actionable insight across the entire organization. 

PerformancePoint also enables businesses to broadly deliver performance management capabilities across the organization by rapidly bringing together the power and ease of use of Microsoft Office and the performance, scalability, and security of Microsoft SQL Server. Customers are able to extend their Microsoft investment and reap the benefits of an application that is easy to use and less costly to deploy than traditional solutions.

Here is an example of a full BI architecture with SharePoint, PerformancePoint and Enterprise Reporting: