Hi Chris AM,
Welcome...re: "as an amateur....I work in an automobile company", there are several ways one should approach this (drawing from time as an automotive Adv SQ @ large OEM and a Sr. PM for a large Tier 1:
1) If for a new or would be supplier to your firm, urge you to make this a cross-functional effort...involving key stakeholders such as Product eng., Purchasing etc., to construct a Excel SS or similar "SEA" or Supplier Eligibility Assessment or similar. This is so crucial, to ensure your firm gets off on the right foot with suppliers...all will know for certain "expectation as well as Roles & Responsibilities"
2) If, an existing supplier to your firm, cross-functional effort as well ...involving all key stakeholders such as Product Eng., Purchasing etc., to construct a Excel SS or similar "Annual Audit Assessment or "AAA. This too is crucial, to ensure your firm gets what they are purchasing in all areas, also helping to ensure timely/clean launches.
Lastly, and equally important, take the time to do it right, take the initiative....very likely your efforts will be recognized
Hope this helps
Optomist1