1. A computer implemented adaptive classification method comprising: producing at least one first classification result using one or more first classifiers and one or more first data sources; producing a first decision using the at least one first classification result and a first set of one or more respective weights respectively associated with the one or more first classifiers; selecting at least one second classifier if the first decision has a first prescribed value; producing at least one second classification result using the one or more first classifiers and the at least one second classifier and the one or more first data sources and at least one second data source; and producing a second decision using the at least one second classification result and a second set of one or more respective weights respectively associated with the one or more first classifiers and with the at least one second classifier.