Rocket production lines?

[Gerdih]

I have some questions about this: Assuming that a rocket is used enough to think about a production line for it (lets say soyuz or falcon 9 in future) I would like to ask some questions:

Is this feasible or logical? why? and how do you think this can be useful?
Would reduce launch costs? why?
In which grade is now implemented this construction way?

 

[Eccentrus]

unless there are tens of launches each day, I don't see any of this becoming practical or useful

 

[Urwumpe]

I have some questions about this: Assuming that a rocket is used enough to think about a production line for it (lets say soyuz or falcon 9 in future) I would like to ask some questions:

Is this feasible or logical? why? and how do you think this can be useful?
Would reduce launch costs? why?
In which grade is now implemented this construction way?

It is pretty much like for aircraft for the more popular launchers already. Just look for example here:

 

[John_L]

The assembly line process has been around for a long time and is responsible for reducing costs in most manufacturing industries, so regardless of the number of launches "per day" it can serve to reduce costs. At the end of the day, it comes down to how many man hours are needed to complete a rocket, hence, if you can reduce the number of man hours, you reduce the cost.