Is the right person backing this programme, and do they have the authority to make it happen?
Does the organisation know what it is buying, what will change, and what "done" actually looks like?
Are the decision structures, escalation paths, and reporting cadences defined before the programme starts?
Is the relationship with your implementation partner set up for accountability, or are you relying on trust alone?
Is the business actually prepared for the disruption a major programme creates?
Does the organisation have the internal capability to run this programme, or is it entirely dependent on external partners?