Happiness IndexAsking people how happy they are is an important quality of life measurement.
MedicineIt is common for medical analysis to be based on patient reported ratings such as a pain scale.
Customer SatisfactionCustomer reported satisfaction with a product, service, firm or brand. An extremely common and widely used business metric for more than 60 years.
Reputation SystemsSales in industries such as hotels and restaurants are heavily influenced by ratings by customers.
Sensory AnalysisSensory analysis such as taste tests are a common product development and quality assurance practice in many industries.
The mapping of human perception and thought to numbers.
Numerical data based on human observations.