Why?!
One thing that is common among all project systems is that we must understand why we are doing the project, because that understanding helps us align ourselves with the goals and increase our chances of meeting them. This is not limited to the project manager – everyone in the team must understand it. This understanding will be used to make important decisions as well. To be clear, the previous example is a high-level decision, and therefore, it should be escalated to the higher levels of the organization to make it anyway.
Next: Justification