Simply put, quantitative measurements deal in quantities. They are numeric values such as the total number of members, revenue in dollars, web page views, number of Story Points completed, and so on.
Qualitative metrics relate to the qualities of something. They reflect the sentiments of a person expressed as feelings, opinions, views, or impressions. Examples of qualitative metrics include customer satisfaction and team member happiness.
Sometimes we'll combine both quantitative and qualitative measurements. For example, we judge ease of maintenance for software on:
- Cyclomatic complexity: A quantitative measurement of the number of independent paths through our code; the more paths, the harder ...
