Packages are the basic element of orchestration in ODI. This is where you will sequence your interfaces, and define what operation to perform when a step (or interface) fails. One important point to keep in mind is that packages can be very sophisticated with the use of tools, but the execution of the different steps in a package is always sequential. For execution of steps in parallel, we will look into Load Plans a little further down in the chapter.
Since you cannot use an interface from a different project in a package, packages will be created in the same project as the interfaces.
Further, for the code to be easier to maintain, one approach is to organize interfaces and packages in a folder (and as many subfolders as needed) so that a folder only contains one package and the interfaces needed for that package. Interfaces that would be shared across packages can be grouped in a separate folder, still in the same project.
To create a package, go to the Packages...