Awhile back, I asked the question about whether it made sense to have a BOM structured to simultaneously produce and consume an item.
Thanks for the help and it does what I thought it should. We have a local difference of opinion on the consumption of primary components, though. To attempt to ensure that we account for the bleed-off of materials into a vacuum system, we set up a BOM like this
Material A 498.379
Material B 332.253
Material C 14.914
Material D 22.371
Material E 64.317
Material F 103.570
Material F -35.804 (This is the quantity vacuumed away, treated as by-product.)
to cover a recipe card structured like this
Material A 481.150
Material B 320.775
Material C 14.400
Material D 21.600
Material E 62.100
Material F 100.00
The difference of opinion is whether to recognize the reclaimed material (Material F) at all on the BOM, with a minority saying that we will not consume (and therefore not order) enough of materials A through E. They say that "you have to put the same amount of good ingredients in as you produce because it's a closed loop system".
So the other approach would be a BOM like this
Material A 534.252
Material B 357.852
Material C 15.840
Material D 23.760
Material E 68.310
The material reclaimed (Material F) is sourced not only from this particular vacuum system, but from other vacuum systems outside the blending operation.
It seems to me that the first approach is correct, because we recognize consumption and production of the reclaimed item, and proportionately increase the component items to recognize that more are needed than will go out as good product. Even the reclaim becomes reclaim. The amounts vacuumed off seem to be consistent at 3.57%.
Which approach is correct?