1. A training apparatus on board a machine, the training apparatus comprising: a feedback representation module configured to provide a feedback to an operator of the machine; and a selector module configured to enable the operator to select at least one of the following training levels; a simulation training level, wherein the training apparatus provides a training to operate the machine when the machine is in a power of mode; a direct feedback training level, wherein the training apparatus provides the feedback to the operator when the machine is running; and a corrective training level, wherein the training apparatus provides the feedback about a corrective action performed based on at least one operator's input when the machine is running.