Well If I answer this question in one word, it’s YES. OEM definitely needs IETM.
Then I need to justify why “YES” And about alternatives if any. Now IETM has become a mandatory deliverable when OEM is supplying any Electrical, Mechanical or electronic systems to the Navy/IAF/Army All manuals i.e. UHB, Technical Manuals soft copies / PDFs anyhow how will be given on DVD and the same will also be given as Hard copies. IETM software /DVD is also supplied along with them.