In the USSR, the first five-year Plan began in 1928. The Revolution and Civil War ended in 1922 Oct (the "main phase" according to wikipedia). That's, coincidentally, a five-year gap.
So I would like to know what industrial work, if any, was done in that intermediate time of 1923-1927. I don't really understand why they took 5 years before starting a serious heavy industry project or priority. If the Civil War was over in 1922 then, as far as I can see, they should be starting the rebuilding immediately.
Did they actually have heavy industry projects during that time? Did it compare to the first 5-year plan? Or was this just the result of Stalin finally consolidating enough power to push his version of industry? Or they didn't have enough skilled engineer students?
What heavy industrial work was done 1923-1927? And why did the official industrial 5YP not begin until 1928?