The quality of a service is the degree to which it conforms to pre-set standards of care.
Source: Donabedian A (1980) The definition of quality: a conceptual exploration. In: Explorations in Quality Assessment and Monitoring. Volume 1: The Definition of Quality and Approaches to its Assessment. Health Administration Press, Ann Arbor.
Example of the term in use:
In 2016, WHO published standards for improving the quality of maternal and newborn care in health-care facilities. The standards place people at the centre of the care by improving both the provision of, and patients’ experience of, health care; they are a critical part of strengthening health systems.
World Health Organization. Maternal, newborn, child and adolescent health. What is Quality of Care and why is it important? http://www.who.int/maternal_child_adolescent/topics/quality-of-care/definition/en/