Diagnosis is the identification of the nature and cause of a certain phenomenon. Diagnosis is used in many different disciplines, with variations in the use of logic, analytics, and experience, to determine "cause and effect". In systems engineering and computer science, it is typically used to determine the causes of symptoms, mitigations, and solutions.^[1]

Computer science and networking

• Bayesian networks
• Belief network
• Computer-assisted diagnosis
• Complex event processing
• Diagnosis (artificial intelligence)
• Event correlation
• Fault management
• Fault tree analysis
• Grey problem
• RPR Problem Diagnosis
• Remote diagnostics
• Root cause analysis
• Troubleshooting

Mathematics and logic

• Bayesian probability
• Hickam's dictum
• Occam's razor
• Regression diagnostics
• Sutton's law

Medicine

• Medical diagnosis
• Molecular diagnostics

Methods

• CDR Computerized Assessment System
• Differential diagnosis
• Medical diagnosis
• Retrospective diagnosis

Tools

• DELTA (taxonomy)
• DXplain
• List of diagnostic classification and rating scales used in psychiatry

Organizational development

• Organizational diagnostics

Systems engineering

• 5 Whys
• Eight Disciplines Problem Solving
• Machine fault diagnosis
• Problem solving

Taxonomy

• Diagnosis (taxonomy)

• The dictionary definition of diagnosis at Wiktionary