You are correct !!
I have seen many a promising development project dropped because it was not explained to the supervising executive in the words that they could understand and clearly envision for the sake of budget allocations.
Some times I have found that pictures, usually with numbers to indicate which color crayon to use for infill, often must be resorted to!
On a less sarcastic note, Patterns were often color coded, depending upon the material they were to be cast 'from', so that the finished sizes would match the shrinkage rate of the material being poured, thus you could have parts of say, Iron, Brass, and Aluminum, cast, and come out at matching sizes. The Patternmaker (A VERY skilled Trade!) would dimension the Patterns to the material used, and a lot of very high quality wood, would leave the shop slathered in colored paints so the Foundryman knew what metals they were expecting to pour in the molds made from those patterns.
In all seriousness, though, depending upon the field in question, there is often an associated vocabulary, of words that have very specific meanings, that help to keep confusion (such as just happened in this thread) down to a bare minimum. Sometimes, like listening to a Doctor, or your Dentist calling out odd words and numbers to his assistant as he probes around various parts of your anatomy, it can verge on Code, unintelligible without the knowledge of what it means, but perfectly clear to the other knowledgeable folks around.
Casting and foundry terminology is not very complex, but the various words used, are specific in their meaning and are clear to all, generally.