By the time the bricklayers are there to start on the project, most of the time the choice of cement mixture is already made. For most projects, a standard cement mixture is used and a custom one isn't even needed.
When issues do arise during the project, an expert is brought in/consulted. Standard cement formula's might change over time, for varied reasons, but it's not the bricklayers that keep themselves busy with that.
> but *figuring out that formula* has already happened.
Me
> It seems we are *constantly changing* the cement formula.
You
> doesn't change anything
Really?
OP makes the classic error to assume that A) physical engineering isn't changing; B) computer world is analogous to physical.