The charter will not tell you whether your problem statement is true. It accepts 48 minutes, 22 per cent and 340 complaints per month because you typed them. If the baseline came from a report nobody has validated, the charter will carry that error through every later phase with full confidence. Verifying the baseline is Measure phase work, and the charter happens first.
It will not find your root cause. Nothing in the fields asks why delivery takes 48 minutes. That is deliberate. A charter that names a cause has skipped two phases. If you already know the cause, you are probably wrong, and the charter is not the document that will correct you.
It will not validate the benefit figure. The $360K annual benefit target is an input, not a calculation. The tool has no visibility of your cost model, your margin or your refund policy. A finance partner has to sign that number, and the charter does not substitute for that conversation.
It will not create authority. A sponsor name in a field is not sponsorship. If Su Chen has not read the document and agreed to the scope boundary, the charter is a wish list with a letterhead. It will also not manage the project, track progress, or tell you when the 22 per cent late deliveries figure has moved. Those belong to the Measure, Improve and Control phases.
What it does do is force a set of specific commitments into one page before work starts. That is a smaller job than it sounds, and a more useful one than most teams expect.