Phil Parkin (10/17/2013)

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I think that the Conclusion in Koen's blog needs a bit of a tweak. Perhaps something like this?

Only when you want to set up a dedicated SSIS Server will you need to install Integration Services on its own, and if you do this you’ll need to store your packages on the file system.

If you read the sections above the conclusion, you'll see that the packages were executed successfully (using dtexec) only when the Integration Services checkbox was ticked during installation.