Abstract: In an example in accordance with the present disclosure, a system is described. The system includes a data collector to collect usage data for the electronic device over a first period of time. The system also includes a model generator. The model generator extrapolates usage data for the electronic device over a second period of time that is longer than the first period of time and predicts a state of the electronic device based on extrapolated usage data for the electronic device over the second period of time.

Abstract: In an example in accordance with the present disclosure, a system is described. The system includes a database. The data base includes 1) forecasted values of an event indexed by date and 2) actual values of the event indexed by date. The system also includes a non-transitory machine-readable storage medium to store instructions. The system also includes a processor to execute the instructions. The instructions to cause the processor to determine, from a current date and based on a forecasting frequency and forecasting category for forecasted values, previous dates for which there is both a forecasted value and an actual value. The instructions also cause the processor to identify those previous dates for which there is both an actual value and a forecasted value as dates by which a forecasting model accuracy is to be determined.