Run the analyis of the model
            Doesn't return anything, but creates a new item ``LcoptModel.result_set`` containing the results

def analyse(self, demand_item, demand_item_code):
        """ Run the analyis of the model
            Doesn't return anything, but creates a new item ``LcoptModel.result_set`` containing the results
        """
        my_analysis = Bw2Analysis(self)
        self.result_set = my_analysis.run_analyses(demand_item, demand_item_code, **self.analysis_settings)

        return True