Factorio Forums

TL;DR
Adding modules to building should not wait for building to be constructed.
What?
When building with modules is scheduled for construction by blueprint or copy&paste, construction bots with modules should be dispatched immediately and not wait for building has been constructed.
Why?
To construct buildings with modules faster.

No. This would cause bots to have to wait until building is placed and if there are no items that place building that robot with modules would be stuck or more complexity would be needed with robots task scheduling.

Bots already wait to construct building in place sopmething that needs to be deconstructed.

AdamK wrote: Sun Mar 15, 2026 7:09 am Bots already wait to construct building in place sopmething that needs to be deconstructed.

Robots won't be assigned to build something until a robot is assigned to remove anything that needs to be deconstructed.

boskid wrote: Sun Mar 15, 2026 4:26 am No. This would cause bots to have to wait until building is placed and if there are no items that place building that robot with modules would be stuck or more complexity would be needed with robots task scheduling.

Doesn't landfill behave this way? I believe I've seen bots waiting for landfill to be places before placing the building.

IIRC, why is it OK in one case and not the other?

Rseding91 wrote: Sun Mar 15, 2026 12:09 pm

AdamK wrote: Sun Mar 15, 2026 7:09 am Bots already wait to construct building in place sopmething that needs to be deconstructed.

Robots won't be assigned to build something until a robot is assigned to remove anything that needs to be deconstructed.

Could we change the suggestion to similar behavior? So the module bots will dispatch when the building's bot does?

mooklepticon wrote: Mon Mar 16, 2026 4:03 pm Doesn't landfill behave this way? I believe I've seen bots waiting for landfill to be places before placing the building.

IIRC, why is it OK in one case and not the other?

this exactly.

mooklepticon wrote: Mon Mar 16, 2026 4:03 pm

boskid wrote: Sun Mar 15, 2026 4:26 am No. This would cause bots to have to wait until building is placed and if there are no items that place building that robot with modules would be stuck or more complexity would be needed with robots task scheduling.

Doesn't landfill behave this way? I believe I've seen bots waiting for landfill to be places before placing the building.

IIRC, why is it OK in one case and not the other?

It does not.

That is very confusing to me because I know I've waited on landfill to show up. Unless this is a Mandela moment.

Rseding91 wrote: Tue Apr 28, 2026 4:23 pm

it does if you have the landfill to fill the request. I even saw case where somehow some personal bot was deadlock waiting for landfill that never come (maybe some little issue with robot task queue https://factorio.com/blog/post/fff-374 but nothing that enable/disable personal ropoport can't fix so I don't care haha). That happen a lot to me when I use https://mods.factorio.com/mod/mining-patch-planner and https://mods.factorio.com/mod/Water_Ores

Taking my claim from a video in a FFF https://factorio.com/blog/post/fff-383, it's a bit fast but if you pause you can see all bot go at the same time to build.



Also, note that I don't really care that much for this feature, I just wanted to argue the reasoning for refusal was weird. I have no strong opinion about this I can completely play factorio with my bot waiting a little before try to put landfill or module.