The first 3 items are repetitions, but the fourth has not been explicitly discussed.

When the decision maker uses our tools to arrive at a decision, that decision has to be "sold" before it can be implemented. One can design a wing (or a transportation system), but there will always be an oversight group to convince that the right compromises have been made. In the case of the wing, the boss will want to be satisfied that the right trade off between manufacturing cost and aerodynamic performance has been made, and that the right trade off has been made between "cruise" performance of the wing and performance during take off, climb, and landing.

Tools that document the decision process would be invaluable not just here but in any open decision process. There will generally be the need to convince others that one has made a defensible compromise between competing concerns.