Diagnostics refers to the process of identifying a disease or condition based on a patient's symptoms and medical history. It often involves various tests and examinations, such as blood tests, imaging studies, and physical assessments, to gather information about the patient's health. The goal of diagnostics is to determine the underlying cause of a patient's issues, which can help guide treatment decisions. Accurate diagnostics are crucial in fields like medicine, psychology, and engineering, where understanding the problem is essential for effective solutions.