This could be probably be simulated by building self-destructing ships (adding 1PP to the stockpile each), but that would really suck (lots of unnecessary artifacts: the ships (probably would need also need special ship hulls not influenced by upkeep costs and should not partake in combat at all), the sitreps, one extra turn delay; and also would be incompatible with stockpile input limits). Creating hidden ships not being part of your own empire would solve some of those artifacts i guess...
So there was the idea that there could project build items in the queue for which you can specify an amount and a number of turns/repetitions (similar to building the ships),
Design discussion is happening currently here: Feedback Imperial Stockpile (Rev 4,5). Unlimited input Rulez
First talk about such a feature Refining the imperial stockpile
So there are many issues at hand, which i dont know how to start about
- adding a new type besides buildings and ship for the build queue.
- instead of creating a finished project, transfer the PP amount into the stockpile when processing (and predicting) production queue
- UI - somehow reuse the ship UI
- adding the project to the build options, so you can drag'n'drop into the queue
- FOCS/parser support(?)