Answer
Five-year plans, introduced under Ordzhonikidze's leadership in the People's Commissariat of Heavy Industry (NKTP), aimed to rapidly industrialize the Soviet Union. These ambitious plans set specific production targets for various industries, focusing on sectors like metallurgy, machine-building, and energy. By mobilizing resources and coordinating efforts, the five-year plans played a crucial role in transforming the Soviet economy, spurring rapid growth and modernizing the nation's industrial base.