Which country is the "Pioneer" in National Planning?

Soviet Union

A plan spells out how the resources of a nation should be put to use. It should have some general goals as well as specific objectives which are to be achieved within a specified period of time; in India plans were of 5 years duration and were called "Five year plans" and long term plans with duration of 20 years were called as "Perspective plans".

The concept of 5-year planning was pioneered by "Soviet Union". Soviet Union comprised of 15 countries or we can say 14 + Russia.