olemus
sõltub kontekstist

näiteid
ISO/IEC 2382:
mõõt, mis näitab, kui hõlpsalt on programm inimesele loetav ja kui hõlpsalt on tegeliku maailma andmetele ja algoritmidele vastavatena eristatavad lahenduse andmestruktuurid või andmeobjektid ning algoritmid.
= measure of the ease with which a person may read a program and of the ease of isolation of the data structures or data objects and algorithms in the solution that map to the real-world data and algorithms

"Programming is 10% writing code and 90% understanding why it's not working"

ISO/IEC/IEE 24765:
süsteemist arusaamise kergus nii süsteemikorralduslikul kui ka detailmäärangu tasemel, puudutab seostust üldisemal tasemel kui loetavus
= ease with which a system can be comprehended at both the system-organizational and detailed-statement levels
Note 1. Understandability has to do with the system's coherence at a more general level than readability does.

ülevaateid
https://www.infoq.com/articles/understandability-metric-not-tracking/
https://www.cncf.io/blog/2020/08/20/understandability-what-is-it/
https://arxiv.org/pdf/1004.4463.pdf
https://bjpcjp.github.io/pdfs/devops/SRS-understandability.pdf
http://www.ijiset.com/v1s6/IJISET_V1_I6_20.pdf
https://eudl.eu/pdf/10.1007/978-3-642-37949-9_82
https://pure.tue.nl/ws/portalfiles/portal/78851660/2017_IST_Dikici_Turetken_AuthorVersion.pdf