Accuracy and completeness with which users achieve specified goals.
Source(s):
NISTIR 8040
under Effectiveness
from
ISO 9241-11:1998
extent to which planned activities are realized and planned results achieved
Source(s):
NISTIR 8053
from
ISO/IEC 27000:2014
the robustness of the result itself
Source(s):
NIST SP 800-55
[Superseded]