The Pentaho Design Studio is a collection of editors, viewers and administration modules integrated into a single application that provides a graphical environment for building and testing Action Sequence documents, and JFree reports.
It is based on the Eclipse application framework which is an open source software development project dedicated to providing a robust, full-featured, commercial-quality, industry platform for the development of highly integrated tools. Eclipse provides building blocks and a foundation for constructing and running integrated software-development tools. It allows tool builders to independently develop tools that integrate with other people's tools so seamlessly you can't tell where one tool ends and another starts. Leveraging Eclipse gives us a number of advantages including; an existing well known and well defined framework, the ability to integrate different tools while maintaining a common look and feel, reuse of existing components and a huge savings in development time.
After reviewing this user's guide you're encouraged to visit the Pentaho Building Solutions Guide for an example of how to use the Design Studio with your installed Pentaho BI Server.