For an expensive one-off like that there needs to be wiggle room to deal with design uncertainties and the unknown-unknowns.
Fixed price might be more reasonable for smaller less expensive missions where the uncertainties are less and the tolerance for failure is higher.
For an expensive one-off like that there needs to be wiggle room to deal with design uncertainties and the unknown-unknowns.
Fixed price might be more reasonable for smaller less expensive missions where the uncertainties are less and the tolerance for failure is higher.