QA stands for Quality Assurance. QA nurses oversee and ensure that facilities comply with various regulatory requirements. They may also review incident reports, perform root cause analysis to determine how/why the incident occured (was it a system failure, process failure, etc.). They will then work on a solution to rectify the problem. They may also work in credentialing where they are responsible for researching the credentials of physicians, nurses, therapists and any other staff position that requires a license or certification. They review patient and staff safety issues as well as develop and implement policies to ensure safety within the facility. They may research complaints and/or concerns of patients and staff. They might develop and implement programs to increase quality of care, and measure the outcomes of these programs over time.