Quality of Life Index: Quality of Life Index (higher is better) is an estimation of overall quality of life by using an empirical formula which takes into account purchasing power index (higher is better), pollution index (lower is better), house price to income ratio (lower is better), cost of living index (lower is better), safety index (higher is better), health care index (higher is better), traffic commute time index (lower is better) and climate index (higher is better).
Safety Index: is an estimation of overall level of safety in a given city or a country. If the city has a high safety index, it is considered very safe.
Health Care Index: is an estimation of the overall quality of the health care system, health care professionals, equipment, staff, doctors, cost, etc.
Property Price Income Ratio: Price to Income Ratio is the basic measure for apartment purchase affordability (lower is better). It is generally calculated as the ratio of median apartment prices to median familial disposable income, expressed as years of income (although variations are used also elsewhere).
Traffic Commute Time Index: is a composite index of time consumed in traffic due to job commute, estimation of time consumption dissatisfaction, CO2 consumption estimation in traffic and overall inefficiencies in the traffic system.
Pollution Index: is an estimation of the overall pollution in the city. The biggest weight is given to air pollution, than to water pollution/accessibility, two main pollution factors. Small weight is given to other pollution types.
Climate Index: is an estimation of the climate likability of a given city or a country. It is in the range 0 to 100 (higher is better). Cities with climate index 100 have moderate temperatures and low humidity and no other major weather condition which is usually not preferred by most people. However, some persons prefer colder climate while others prefer warmer climates and some people are fine with humid conditions, so this index is general guidance, which shall not be blindly considered.