I would like to describe a business process that can either undergo a qualitative or a quantitative change and seek a better wording to contrast the two terms. Specifically, I am describing an ecological improvement in product packaging when one can either physically reduce packaging material (quantitative) or change the quality of packaging material (qualitative).
Which set of two terms can successfully replace the quantitative vs. qualitative meaning in this context?
EDIT: This is the actual piece of my essay that uses these terms, which I felt was not as precise as it could potentially be:
There are two major ways, quantitative and qualitative, to make product packaging more environmentally friendly. With the quantitative improvement, product packaging undergoes a physical reduction of material use, whereas with the qualitative improvement, only the nature of packaging material is changed.