[2] It also refers to the ability for software to perform well in unforeseeable scenarios and to keep a relatively low defect rate.
These specified procedures and outlined requirements lead to the idea of Verification and Validation and software testing.
It is distinct from software quality assurance which encompasses processes and standards for ongoing maintenance of high quality of products, e.g. software deliverables, documentation and processes - avoiding defects.
Whereas software quality control is a validation of artifacts compliance against established criteria - finding defects.
Verification and validation assure that a software system meets a user's needs.