Before you start the i-lign implementation process it is worth considering:

Now Then
Confirming where you are now as an organisation. Confirming where you want to get to.
Confirming you clearly understand the problems you're trying to solve. Confirming there is the necessary support required to solve the problems.
Thinking about what could get in the way of your success. Thinking about how you plan to deal with any potential roadblocks.
Listing the benefits you hope to get from improved project management. Ensuring those benefits are sustainable.
Listing the benefits you hope to get from improved project management. Ensuring those benefits are sustainable.
Securing the implementation resources you must have in place. Understanding the importance of an active, interested business sponsor.