As Glass's Forecast is accessed via a secure internet connection, there is no requirement for users to install, maintain and update the forecasting software and the underlying Glass's data on their own computer servers.
In the UK, the system uses forecasting methodology devised by the Glass's editorial team.
Each forecast takes into account key variables such as: changing patterns of depreciation during a vehicle's lifecycle, the impact of new car sales on used car availability and values, a vehicle's uptake by rental businesses, and trade opinion.
Glass's Forecast also tracks economic factors, including gross domestic product, interest rates and changes in exchange rates.
Users can assess and report on how the specific characteristics of an individual vehicle, such as optional extras, affect its longer-term value.