The Chevrolet-to-Cadillac hierarchy offered a convenient ranking system for other lines of consumer products marketed with gradations of quality and price.
Letters used to designate level 1 to 3 studies indicated gradations of quality ranging from 'a' (higher quality) to 'b' (lower quality).
They reach outwards through gradations of quality of health services represented by the dashed lines towards the outer limit of high quality health care services.
(That study was described as the highest-quality study by Jackson and colleagues [ 16], a randomized control trial, and was rated according to the Oxford Centre for Evidence-based Medicine guidelines, with gradations of quality from 1a to 5[19]9].) To assess PTSD-related symptoms, they used a score of more than 19 on the Impact of Event scale (IES), developed by Horowitz in 1979.
Only 16% of guidelines used gradation of evidence quality and these were primarily from high-income countries (p = 0.001).
Although it is desirable to reflect such gradation of downgrading quality of used materials in a model, I do not introduce such reality into the present one, since the model would be too complicated to be solved.
As estuarine zones are confluence of fresh and saline water system, sharp gradation of water quality while approaching toward coast from inland gives an idea about the effect of land use/landscape along with different mixing pattern at that point.
But the families had branches and gradations of perceived quality, often depending on whether the maternal figures had been wives or concubines.
In the Kabbalah, the "third way" of hierarchy, growth, and evolution without gradations of privilege, quality and power is the way of the sefirot.
Nevertheless, his explorations of the gradations of tone colour influenced Liszt as well as Schumann.
