Case formulation, also known as clinical formulation, is a theoretical explanation or conceptualization of the information obtained from a clinical assessment. Basically, it constitutes a hypothesis about the nature of the presenting symptoms and varies from the categorical approach to diagnosis and provides a framework for planning the most useful and appropriate approach to treatment. This basic approach is used in documenting and planning in both physical medicine and psychological treatment and must be flexible enough to accommodate new information and adjust for any improvements or decompensations shown by the patient/client.