(In mathematical terms it would be Q/C=V).
The argument is that if the goal to be achieved is Quality of effective and high value, it is achieved first with the least cost, i.e.achieving more Quality per dollar or best bang for the buck. Alternatively if costs are not reducible, then the Quality has to be of a higher grade to achieve a better value.
Quality as an intangible, a sense of being more perfect or more satisfying. A Cadillac versus a Ford, A Harley Davidson versus everything else. Or you can think of Quality in a Crosbian “meeting customer requirements” or achieving customer satisfaction. In any case it is still an intangible, and both a real and ethereal wisp. You might want to quantify Quality by saying approaching or achieving error free, but it would be still difficult to put a number on it. (Indeed accreditation bodies may pronounce an organization as having achieved 98% Quality.) The point is that Quality is an achievable state, but is not a substance to be divided.