# Qualitative methods for engineering systems: Why we need them and how to use them

> Research article (Systems Engineering, 2017) · cited 64× · AI/ML

**Wikidata**: [openalex:W2772329970](https://www.wikidata.org/wiki/openalex:W2772329970)  
**Source**: https://4ort.xyz/entity/qualitative-methods-for-engineering-systems-why-we-need-them-and-how-to-use-them