1. Measure of extraction efficiency.
2. In mining, the percentage of metal derived from an ore, or coal from a coal seam, etc.
3. In petroleum geology, the percentage of the in situ oil that is recoverable. Between 20% and 40% is common for primary recovery techniques, but enhanced recovery by use of water injection, detergents to reduce viscosity, etc., may increase the recovery factor to 75%. Recovery factors for natural gas can be as high as 90%.
"recovery factor." A Dictionary of Earth Sciences. . Encyclopedia.com. (January 16, 2019). https://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/recovery-factor
"recovery factor." A Dictionary of Earth Sciences. . Retrieved January 16, 2019 from Encyclopedia.com: https://www.encyclopedia.com/science/dictionaries-thesauruses-pictures-and-press-releases/recovery-factor