Evidence based practice(EBP) is a decision making the process by clinicians involving the use of theory-derived and research based knowledge for informing decisions on care delivery. It is a problem-solving method for clinical practice and relating administrative issues that consider:

Nursing excellence is an ability to promote health and well-being of healthy and ill individuals. Excellence involves providing caring action that contributes towards achieving optimal health and outcome for a patient, the nurse, and health system. This kind of health promotion is for everyone from an individual, facilities, and communities.

Environmental health is a branch dealing with all aspects of natural and built environment that affect the health of human beings.It investigates the effects of exposure to environmental hazards such as chemical pollutants, technological, natural or terrorist disasters. Scientists use these results to develop, evaluate and implement strategies to prevent or reduce the harmful exposures.It is the reason why environmental health and protection are related. Environmental protection is about protecting the natural environment for human health and best ecosystem.

A health care system is an entire organization of people, resources, and institutions that deliver health services to meet the needs of a target population. Some aspects of planning can involve the market participants such as insurance companies, drug manufacturers, and hospitals.