def METHOD_NAME(bpr, tsd, t):
    """
    Control of activity of economizer of mechanical ventilation system
    Economizer of mechanical ventilation is controlled via zone set point temperatures, indoor air temperature and
    outdoor air temperature.
    Economizer is active if the indoor air temperature exceeds the set point and the outdoor temperatures are lower
    than the set point.
    Economizer increases mechanical ventilation flow rate to the maximum.
    Author: Gabriel Happle
    Date: APR 2017
    :param bpr: Building Properties
    :type bpr: BuildingPropertiesRow
    :param tsd: Time series data of building
    :type tsd: dict
    :param t: time step / hour of the year
    :type t: int
    :return: Economizer ON/OFF status
    :rtype: bool
    """
    if has_mechanical_ventilation_economizer(bpr) \
            and tsd['T_int'][t-1] > bpr.comfort['Tcs_set_C'] >= tsd['T_ext'][t]:
        return True
    else:
        return False