In the legal aspect there are multiple considerations to take into account, the first I’ve researched about is the PCB quality production.
[Standard Quality Assurance Requirements for Printed Circuit Boards] (https://s3vi.ndc.nasa.gov/ssri-kb/static/resources/gsfc-std-8001.pdf)
This document contains quality characteristicas required by NASA Standards.
Some characteristics are:
IPC-6012 Space Addendum, Space and Military Avionics Applications Addendum to IPC-6012, Qualification and Per...