Building time in Inter-War is calculated by the backend when a construction job is created. A simple “classic” formula copied from another game version is therefore not authoritative; final duration comes from the current level cost, universe configuration and active reductions.
What can reduce building time?
The time service composes several deterministic factors, including construction infrastructure, Nanofactory effects and account/event bonuses. The Constructor currently gives −5% building time per level and the Resort Officer −2% per level.
How is the Nanofactory handled?
The time model builds its power-based effect using integer/BCMath logic, avoiding ordinary floating-point overflow or precision drift at high levels.
Does an active queue item constantly change?
A job receives a server-calculated schedule when it is added. Do not assume every later officer or configuration change freely recalculates an already-running item.
FAQ — building time
Can universe speed change the duration?
Yes. World configuration participates in the calculation.
Can a client-provided timer speed it up?
No. Timing is calculated and enforced server-side.
Related FAQ: How does building cancellation work? · How does the Research Lab work?