I am doing a PhD in Mechanical Engineering. I have little experience with CAD programs, and I have to design an assembly in my project for manufacturing. As my supervisor is busy, and also not a specialist in CAD, I am thinking in hiring a CAD consultant of a company. Her tasks are basically to verify my CAD parts and ensure that everything is fine for manufacturing, and, if it is not, to send correction and comments about what to do to fix the parts/assembly and brief tutorial on how to do it.
My question is: if I do the work myself and only get suggestions/corrections from someone else, can I encounter any problems later, like having my PhD degree revoked?? I don't want to ask help from my supervisor, as I don't want him to spend 20 hours or more with my work.
Please tell me if I can do it; and if yes, if I need to inform someone, or put something on the thesis regarding it, or anything else.