Also what Jim K has said makes complete sense. 'Once you know how', do it in any sequence you like.
I tend to work somewhere in the middle ground, inletting some things out of sequence, but have also felt the 'sting' of getting out of sequence, like the proverbial painting thine self into a corner. I have made the project more difficult by doing this, or compromising the overall design to compensate for my foolishness.
Oh, now I fully comprehend Jim's caveat "Once you know how", because I have experienced going into a gun WITHOUT 'knowing how', and what the consequences are!
So until you 'know how', I recommend you (and me!) follow a logical sequence.
Which brings up another related subject.
The ability to make changes 'on the fly' to the architecture can be limited if you inlet parts out of sequence.
Example: if you cut both top and bottom profile, and inlet the trigger plate and guard, you may not easily take more off the bottom profile of the stock.
A gun build is a purely natural progression, and most of it is how one part relates to another.
Confuscious say: To get carts before horses can sometimes lead to traffic jam.