TI4 Rules DeskTwilight Imperium 4
Living Rules Reference · v2.0
68

Production (Unit Ability)

During the “Production” step of a tactical action, the active player can resolve the “Production” ability of each of their units that are in the active system to produce units.

A unit’s “Production” ability, which is presented on a faction sheet or unit upgrade technology card, is always followed by a value. This value is the maximum number of units that this unit can produce.
  1. If the active player has multiple units in the active system that have the “Production” ability, that player can produce a number of units up to the combined total of their units’ production values in that system.
  2. When producing fighters or infantry, each individual unit counts toward the producing unit’s production limit.
  3. A player can choose to produce one fighter or infantry instead of two, but must still pay the entire cost.
  4. “Production” value from Arborec space docks cannot be used to produce infantry, even if the Arborec player controls other units that have “Production” in the same system.
When a player produces ships by using “Production,” that player must place them in the active system.
When a player produces ground forces, that player must place those unit on planets that contain a unit that used its “Production” ability.
If a player uses the “Production” ability of a unit in a space area of a system to produce ground forces, those ground forces may either be placed on a planet the player controls in that system or in the space area of that system.

FAQ

Q: When an ability other than “Production” allows you to produce one or more units, do you have to pay for the units produced?
A: Yes, a unit that is produced must always be paid for.
FAQ entry 17
Q: When producing a unit with an ability other than “Production,” does the price reduction from the “Sarween Tools” technology apply?
A: No, “Sarween Tools” is only used with the “Production” ability.
FAQ entry 18

Source: Twilight Imperium: Fourth Edition — Living Rules Reference v2.0 (September 22, 2020), page 26. Rules text reproduced verbatim; the rulebook’s diagrams are omitted.