We shouldn’t simplify the issue as a matter of saying “No” to a manager. It’s a matter doing the technical work and arriving at the right or at least a right answer. And if time and resources to do so are not made available, to say the design process is incomplete or invalid.
Also remember, some of the Boeing engineers hold positions as Designated Engineering Representatives (there is a different term for this meaning the same thing the ODA). In this position the engineer has the solemn duty to determine that regulatory compliance to the safety standards of 14 CFR Part 25 has been established.
This is not mere paperwork, it is based on technical engineering data and analysis from actual tests. The DER must not say compliance has been established when it has not. This is the engineer’s duty as DER. And if management pressure is applied to abbreviate the work or to sign a compliance document when compliance has not been established, then the DER has the DUTY to report it to the FAA. It may cost the engineer’s job depending on the integrity of the management, but the engineer’s word is at stake.