What is mean by Project and Solution in SSIS?

The BIDS paradigm for developing SSIS packages is based on the concept of projects and solutions. 

 A project is a container for one or more SSIS packages.  Projects can be used to organize SSIS packages in a meaningful way.  For instance if I have a number of SSIS packages that are used to load a data warehouse from a particular source system, I might create an SSIS project for all SSIS packages that are used in the ETL process for that source system.  I might create other SSIS projects for the various other source systems that are used to populate the data warehouse. 

A solution is a container for one or more projects.  When you create multiple SSIS projects to organize your packages, you combine those packages into one or more solutions.  Continuing with my example above, if I have several SSIS projects that each represent a source system used to populate a data warehouse, I might create a single solution to hold all of these related SSIS projects.

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