Used to describe something in terms of quality rather than quantity. Often contrasted with 量的 (quantitative).
この研究では、質的な分析が重要だ。
In this research, qualitative analysis is important.
Over the past two years, there has been a qualitative change in the company's culture.
量的な変化だけでなく、質的な変化にも注目すべきだ。
We should pay attention not only to quantitative changes but also to qualitative changes.
The two products differ greatly in quality.
The government is aiming for a qualitative improvement in education.
質的 describes differences in quality or nature, while 量的 describes differences in amount or number.
Formed from 質 (quality) + 的 (-like, -al), a common pattern for creating adjectival nouns from nouns.