This document discusses diagnosis in social casework. It defines diagnosis as the second major process where the social worker attempts to arrive at an exact definition of the client's social situation and personality based on information collected. The social worker forms an opinion about the client's problem and the nature of help required. Diagnosis includes understanding the etiology, or cause and origin, of the client's problem. The content of social diagnosis falls into a triangular pattern including the nature of the client's problem, the client's social and psychological situation, and the nature and purpose of the helping agency. Types of diagnosis include dynamic, clinical, and etiological diagnosis.