def METHOD_NAME(self):
    """
    Retrieves the powergood status of PSU
    Returns:
        A boolean, True if PSU has stablized its output voltages and passed all
        its internal self-tests, False if not.
    """
    powergood_status = False
    voltage_out = self.get_voltage()
    # Check the voltage out with 12V, plus or minus 20 percentage.
    if VOLTAGE_LOWER_LIMIT <= voltage_out <= VOLTAGE_UPPER_LIMIT:
        powergood_status = True
    return powergood_status