Quality requirements (QR) cover how good the functionality needs to be and include aspects such as: Performance, Capacity, Reliability, Usability, Safety, Security, Interoperability, Maintainability, ...

From Öredev 2009 by Björn Regnell.

Stream from Youtube: https://youtu.be/mdiBpDwciC0

Download mp4 (402 MB): http://fileadmin.cs.lth.se/krav/quper-oredev-2009.mp4