Non-functional requirement attributes.
- Compatibility.
 - Security.
 - Reliability.
 - Usability.
 - Efficiency.
 - Maintainability.
 - Portability.
 
- 
↩      
Stephen Watts and Joe Hertvik, “Technical Debt: The Ultimate Guide – BMC Blogs,” July 30, 2020, https://www.bmc.com/blogs/technical-debt-explained-the-complete-guide-to-understanding-and-dealing-with-technical-debt/. (See notes.)