Factory Retooling increases production lines? (possible bug)

[Arakash]

I thought what you're describing was an intentional design.
The way I interpret it, as a factory gets older and looses efficiency some of the lines become rundown/unusable. Retooling the factory makes those lines available again but over time they will deteriorate again.
So, retooling just gives you back access to production lines that have broken, it doesn't actually increase the number you have.

Im referring to an overall increase in lines.

In the example your suggesting, i think your saying this:
Factory A is built with 20 lines
Over time it takes wear and can only use 18 lines
Factory A is retooled and gets 20 lines again.

Im not suggesting that. What i am suggesting is:
Lets say Factory A is built with 20 lines in say 1900
Over time it takes wear and its efficiency goes down, without a large effect on production numbers/lines.
In 1902 Factory A gets retooled, but now has the base number of lines of a factory built in 1902, say 24 lines.

Im not sure it is supposed to be doing that. Why? because in the last version it did, then the resizing mechanic was introduced in this version.
So my understanding of what should be happening.
Retooling only reduces the wear of the factory (increases its efficiency back up to 100)
Resizing changes the sliders of the factory without having to destroy it (so you can change the quality v quantity sliders or tech for e.g.)
Resizing changes the size of the factory, increasing the number of vehicles produced and lines to the standard at at the date of the resize. (currently retooling does this)