1. A powertrain system for a vehicle, comprising: an engine; an electrical energy storage system including an electrical energy storage device selectively electrically coupled to a remote electric power source; a transmission including a transmission input member operatively connected to the engine, a first electric machine operatively connected to a transmission output member, a second electric machine operatively connected to the transmission input member, said first and second electric machines electrically-operatively coupled to the electrical energy storage system; and a control system signally connected to a plurality of inputs and operatively connected to a plurality of actuators, said control system operative to execute program code to control the actuators to operate the engine and the transmission, the program code comprising a) determining operator demands, a powertrain operating state, and operating conditions based upon the inputs, b) selecting an operating strategy based upon the operator demands, the powertrain operating state, and the operating conditions, c) determining a preferred powertrain operating state, and d) controlling the powertrain to the preferred powertrain operating state based upon the selected operating strategy, the operator demands and the operating conditions.