Rating scales play an important role in psychiatric assessment by providing a systematic, objective, and standardized method for evaluating symptoms, severity, and progress of mental disorders. Psychiatric symptoms are often subjective and influenced by personal experiences, making accurate assessment challenging. Rating scales help clinicians measure psychological symptoms in a structured manner and support diagnosis, treatment planning, and monitoring of outcomes. One of the major roles of rating scales is the assessment of symptom severity. They help determine the intensity of symptoms associated with various mental disorders such as depression, anxiety disorders, schizophrenia, bipolar disorder, and substance use disorders. For example, the Hamilton Depression Rating Scale (HAM-D) and Beck Depression Inventory (BDI) are commonly used to evaluate depressive symptoms, while the Hamilton Anxiety Rating Scale (HAM-A) assesses anxiety levels. These scales provide numerical scores that indicate the severity of symptoms and assist in clinical decision-making.