Six-Year Plan (1950–1955) was the second - after the Three-Year Plan (1947–1949) - centralized plan of the People's Republic of Poland. It concentrated on increasing the heavy industry sector. By 1950 the Polish government was dominated by Stalinist hardliners, such as Hilary Minc, and liberal economists responsible for creation of the Three-Year Plan were no longer influencing government policy. The Six-Year Plan, designed to bring the economy of Poland in line with the Soviet economy, concentrated on heavy industrialization, with projects such as Nowa Huta. The plan was accepted by the Sejm on July 21, 1950. Later on, it was modified several times, and never fully completed.