lobf is correct, some of these buildings can be placed in a different order than stated, but some MUST be placed before others or you won't have access to some of the necessary buildings

IIRC
military occupation must be placed first (not sure if it matters, but is standard building procedure)

migration and pastoralism are prerequisites for the other buildings

large nomad market can be placed any time before the reformed gov't

warlords herds MUST be placed before reformed pastoralism or you lose the ability to build them

settled community is prereq for reform pastoralism, but does not affect market or herd placement ability

advanced settlement and settled aristocracy cap and close the "settled community" and "herds" recruitment lines respectively (you will not be able to build units from those lines once those are built), they can be built in whatever order you desire (if you need the infantry/archer recruitment from that settlement more than the cavalry, for instance, you could close the cavalry recruitment first, or vice versa)

you can also build the "herd" or "settled" lines to a higher level, and will still be able to cap those lines with the appropriate bldg (I choose 1 settlement of every 3 or 4 to do this with, and wait on the reformed gov't so I have an emergency advanced recruitment center in case something goes south on me, the drawback to the transition from nomadism is that for a long while during the changeover, you will see little to no troop recruitment, it takes ages to get up to a MIC Lvl 4, which the higher herd levels give cavalry recruitment equivalent to, and lvl 1,2,and 3 MIC's give weak infantry, bog standard archers/skirmishers, and just regular horse archers, the war winning troops come from lvl 4 and 5, or the advanced "herds" line)