def get_score(self, period):
        ''' Get the score for this goal '''

        # Agregar filtro para este goal
        executions = Execution.objects.filter(period=period)
        value = 0

        # Simple values
        value += executions.filter(
            indicator__in=self.indicator_set.filter(accumulated_value=False)
        ).aggregate(total=Coalesce(Sum('result'), 0))['total']

        # Accumulated values
        value += executions.filter(
            indicator__in=self.indicator_set.filter(
                accumulated_value=True,
                accumulated_graphic=True
            )
        ).aggregate(total=Coalesce(Sum('result_accumulated'), 0))['total']

        # Idicators that have been set as accumulated, but we need
        # retrieve the simple value.
        value += executions.filter(
            indicator__in=self.indicator_set.filter(
                accumulated_value=True,
                accumulated_graphic=False
            )
        ).aggregate(total=Coalesce(Sum('result'), 0))['total']
        return value

def get_weight_value(self, goal, accumulated=False):
        ''' Get weight value, to be used in goals '''
        try:
            weight = GoalIndicator.objects.get(goal=goal, indicator=self.indicator)
        except:
            pass

        value = self.result_accumulated if accumulated else self.result
        return (value / weight) * 100