Diagnosis means recognizing the causes underlying a certain phenomenon or issue. Experts use diagnosis for diverse purposes with variations in the application of analysis, logic, and experience in determining “cause and effect” of specific scenarios. In computer science and systems engineering, it is used to figure out what brings about symptoms, solutions, and mitigations. In behavioral health, assessment tools are used to arrive at a diagnosis, which will assist in coordinating successful treatment options. Diagnoses may change over time as new information or symptoms emerge.