1: Projects lack the right resources with the right skills.

2: Projects lack experienced project managers.

3: IT doesn't follow a standard, repeatable project management process. 

4: IT gets hamstrung by too much process.

5: They don't track changes to the scope of the project. 

6: They lack up-to-date data about the status of projects. 

7: They ignore problems. 

8: They don't take the time to define the scope of a project.

9: They fail to see the dependencies between projects.

10: They don't consider Murphy's Law.

full list via cio