What was the goal for Stalin's 5 year plans?

The five-year plans regulated economic life: production, trade, services, prices incomes and expenses. The first five-year plan was from 1928 to 1933; the second from 1933 to 1938. The main goal of the plans was to develop heavy industry (as the Soviet Union separated itself from all the other countries being the only Communist country). This forced industrialisation was produced at the expense of other sectors of economy: agriculture, infrasrtucture and light industry. A military strengthening was also aimed. All sources were to support mining, heavy industries, and energy production. From the beginning, the plans were unreal and the unfulfilled production was punished. It eliminated the motivating effects of market economy. Workers' salary was kept low, consumption was discouraged. The achievements were enormous: the number of factories increased 4 times, electricity generated increased by 800 percent, and steel production increased 500 percent. The USSR was becoming the major industrial power. Meanwhile, as the economic policy concentrated on heavy industry and armament, millions of people died of hunger all around the country.