Review the threats to quality improvement in health care or health sciences reported by Grennan (2013) in this module’s learning activities. Which threat(s) do you believe are the most difficult to overcome? According to the literature, what are the best methods to address these threats? If you have addressed this threat in your professional role as Healthcare Researcher, please share your experience.Identify the theories, models, and processes for promoting CQI use in health care, focusing on the cultures of safety and excellence, and positive healthcare outcomes.Evaluate various tools and methods used in CQI in health care, such as checklists; Plan, Do, Study, Act (PDSA) cycles; flow charts; regression analysis; and measurement of medical errors. attaching pdf article required.