Calculate the percentage of theoretical fine gold actually recovered from a processing or refining run. The tool is deliberately fine-gold based so changing product mass alone cannot falsely inflate recovery.
Refining and processing can dramatically change mass because other metals and materials are removed. Tracking gross product weight can therefore obscure actual gold recovery.
Apparent recovery above 100% should prompt a review of assay, sampling, moisture, weighing, timing and settlement inputs. The arithmetic can be correct while the underlying inputs are not comparable.
Recovered fine gold divided by theoretical contained fine gold.
Theoretical fine gold minus recovered fine gold.
It can mathematically, but such a result needs investigation.
Terminology varies, although the underlying comparison can be similar.