Mass Balance (MB)
It is not always feasible to segregate “sustainable” from “non-sustainable” products, especially when there is no physical difference between the two. In the Mass-Balance model products from both more sustainable and non-sustainable sources are mixed, but as they move through the supply chain an exact account is kept about the volume ratios. Thus it is guaranteed that the amount of sustainable products produced equals the amount (or volume ratios) of sustainable products sold to consumers (ChainPoint). See also Hard identity Preserved.