The Donabedian model is a conceptual model that provides a framework for examining health services and evaluating quality of health care. According to the model, information about quality of care can be drawn from three categories: "structure", "process", and "outcomes". Structure describes the context in which care is delivered, including hospital buildings, staff, financing, and equipment. Process denotes the transactions between patients and providers throughout the delivery of healthcare. Finally, outcomes refer to the effects of healthcare on the health status of patients and populations. Avedis Donabedian, a physician and health services researcher at the University of Michigan, developed the original model in 1966. While there are other quality of care frameworks, including the World Health Organization (WHO)-Recommended Quality of Care Framework and the Bamako Initiative, the Donabedian model continues to be the dominant paradigm for assessing the quality of health care.

The model is most often represented by a chain of three boxes containing structure, process, and outcome connected by unidirectional arrows in that order. These boxes represent three types of information that may be collected in order to draw inferences about quality of care in a given system.

Structure includes all of the factors that affect the context in which care is delivered. This includes the physical facility, equipment, and human resources, as well as organizational characteristics such as staff training and payment methods. These factors control how providers and patients in a healthcare system act and are measures of the average quality of care within a facility or system. Structure is often easy to observe and measure and it may be the upstream cause of problems identified in process.

Process is the sum of all actions that make up healthcare. These commonly include diagnosis, treatment, preventive care, and patient education but may be expanded to include actions taken by the patients or their families. Processes can be further classified as technical processes, how care is delivered, or interpersonal processes, which all encompass the manner in which care is delivered. According to Donabedian, the measurement of process is nearly equivalent to the measurement of quality of care because process contains all acts of healthcare delivery. Information about process can be obtained from medical records, interviews with patients and practitioners, or direct observations of healthcare visits.

Outcome contains all the effects of healthcare on patients or populations, including changes to health status, behavior, or knowledge as well as patient satisfaction and health-related quality of life. Outcomes are sometimes seen as the most important indicators of quality because improving patient health status is the primary goal of healthcare. However, accurately measuring outcomes that can be attributed exclusively to healthcare is very difficult. Drawing connections between process and outcomes often requires large sample populations, adjustments by case mix, and long-term follow ups as outcomes may take considerable time to become observable.

Although it is widely recognized and applied in many health care related fields, the Donabedian Model was developed to assess quality of care in clinical practice. The model does not have an implicit definition of quality care so that it can be applied to problems of broad or narrow scope. Donabedian notes that each of the three domains has advantages and disadvantages that necessitate researchers to draw connections between them in order to create a chain of causation that is conceptually useful for understanding systems as well as designing experiments and interventions.

Donabedian developed his quality of care framework to be flexible enough for application in diverse healthcare settings and among various levels within a delivery system.

At its most basic level, the framework can be used to modify structures and processes within a healthcare delivery unit, such as a small group practice or ambulatory care center, to improve patient flow or information exchange. For instance, health administrators in a small physician practice may be interested in improving their treatment coordination process through enhanced communication of lab results from laboratorian to provider in an effort to streamline patient care. The process for information exchange, in this case the transfer of lab results to the attending physician, depends on the structure for receiving and interpreting results. The structure could involve an electronic health record (EHR) that a laboratorian fills out with lab results for use by the physician to complete a diagnosis. To improve this process, a healthcare administrator may look at the structure and decide to purchase an information technology (IT) solution of pop-up alerts for actionable lab results to incorporate into the EHR. The process could be modified through a change in standard protocol of determining how and when an alert is released and who is responsible for each step in the process. The outcomes to evaluate the efficacy of this quality improvement (QI) solution might include patient satisfaction, timeliness of diagnosis, or clinical outcomes.