Which formula defines batch yield and waste?

• A. Yield = usable product weight / total product weight; waste = total weight minus usable weight; multiply to get percentage
• B. Yield = total product weight / usable product weight; waste = usable weight - total weight
• C. Yield = total weight minus usable weight; waste = total weight plus usable weight
• D. Yield = usable weight / total weight; waste = total weight / usable weight

Answer: (A)

Batch yield is the portion of a production batch that becomes usable product, expressed as the usable weight relative to the total batch weight. It is calculated by dividing the usable weight by the total batch weight, and if you want a percentage, you multiply that fraction by 100. Waste is simply what’s not usable, found by subtracting the usable weight from the total batch weight. Keeping these two formulas linked in this way shows exactly how much of the batch meets the desired use and how much must be discarded or repurposed. Other formulations would distort the relationship, potentially giving nonsensical results like yield that doesn’t reflect a true portion of the batch.