Another reason for failure is, that even when the aviation project is planned correctly there can be delays in submission, review and contract award, all without moving the deliverable date, again contracting the what was an achievable plan into a more restrictive window.
It is understood that it is often the end customer that sets the date. ‘The contract must start on xxxx’, but again this is not derived from proper planning, and bid teams make projects fit. I think if I was the end customer that I would appreciate honest feedback on the feasibility of a project?! But hey ho, that not how the world works as most contracts are awarded on the shoehorned plans at the lowest price!
If only we do it correctly!”