Thank you!  I feel as if I am one step closer to resolving my issue.  

In the following article use-single-and-multiple-units-of-measure-for-items, in the Use a Unit of Measure section, #5 looks like exactly what I need.  In my initial assembly I don't need to track the U/M, I just need the BOM inventory items to be reduced.  Unfortunately, I am unable to find the referred to "Begin defining units of measure" checkbox on the New Item window.

I have attached another screenshot, if you could point me to the Begin... checkbox I would most  appreciative.  Thank you in advance for your assistance.