Modern steel rolling process is commonly designed to produce products with a variety of grade specifications.
Uranium meeting nuclear-grade specifications is usually obtained from yellow cake through a tributyl phosphate solvent-extraction process.
The batch used, met the preclinical grade specifications (Quality Control analyses), in regard to sterility, endotoxins, mycoplasma, viral particles and plaque forming unit titers.
The aggregates 20, 12.5 and 4.75 mm were combined in such a way, so that it meets nearly the combined grading specification of DIN 'A' curve.
If the attribute ranking fulfilled a grading specification, the dataset and algorithm was assigned the "best" grade, where A is better than B, B better than C, etc.
During the course of the synthesis, the anthrone alkylating agent had to be purified three times (by two recrystallizations and one chromatographic purification) before the compound was finally recrystallized from isopropanol to achieve 98.5%% purity, which was the lowest purity grade specification acceptable for clinical trials.
I also want to mention the article in The Chronicle of Higher Education, Prof Hacker Blog, Experimenting with Specifications Grading, Jason B. Jones, March 23 , 2016 which reports on an instructor's experience with specifications grading.
Chapter 10: Conclusion and evaluation of specifications grading.
During the fall semester I came across the concept of specifications grading.
Nilson's article in Inside Higher Ed referenced above, gives a quick overview to specifications grading basics.
The very specific nature of the assignments in this class lend themselves well to the specifications grading approach.
