Engineering (LWR)

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In General

The Engineering Bay houses the engineering team, headed by Dr. Shen.

Build/Buy Items

Here you can build or purchase items that you have the resources for.

Item Production and Foundry Project Speed

Each engineer increases the item production and foundry project speed through a complex formula (this is a rough approximation):

Time (in hours) = Build Time * Optimal Engineers * [1 + (Optimal Engineers / Actual Engineers) ^ (0.06 * Optimal Engineers)] / (1.6 ^ Number of Workshops) 

As long as the the number of available engineers is much lower than the recommended value, recruiting an additional engineer will significantly reduce the completion time. As the number of engineers approaches or exceeds the recommended number, then adding additional engineers has diminishing returns, i.e. each new engineer reduces time by a smaller and smaller amount.

Workshop Discount

A Workshop reduces Credit/Alloy/Elerium costs of all items and foundry projects by 10%. Workshop adjacency bonus counts as half of the Workshop. Multiple Workshops and adjacencies have diminishing returns and discounts cannot exceed 50%. The price you pay is given by formula:

Percent of price you pay = 0.5 + 0.5 * 0.8 ^ (w + 0.5a) 

(Where w is the number of Workshops and a is the number of adjacency bonuses)

Values in the following table represent the natural expansion of Workshops in your base. It is assumed that you first build a Foundry and a Repair Bay, then four Workshops adjacent to them.

Workshops and adjacencies	Total Discount
0.5	5.28%
2	18.00%
4	29.52%
5.5	35.35%
7.5	40.62%

Item Fabrication Capacity

The Engineering Bay grants an item fabrication capacity of 2. This means you can produce a maximum of 2 different item orders simultaneously. All other item orders will be queued to start once they finish. The item fabrication capacity is increased by 1 for every 2 workshops.

Rushing

Rushing the production of an item reduces the base build time by 80%. The cost is 40% more resources and 5 meld.

Due to number of engineers affecting actual build times, when rush building, the final build time will likely not decrease by a full 80% (Click here for more info: Scientists and Engineers)

Build Facilities

By selecting "Build Facilities," a listing of the new facilities available for construction will be provided, along with the associated resource costs and time required for construction. There is no limit on the amount of excavation or construction that can be done at once.

Excavations cannot be rushed, and take 8 days to complete.

Rushing

Rushing the production of a facility reduces the base build time by 80%. The cost is 40% more resources and 10 meld.

The Foundry

SHIV-Specific Upgrades

Name	Credit type	Effects	Prerequisites		Cost
											Other
SHIV Advancements I	Weapons Technology	Grants SHIVs Repair Servos and Lock N' Load. Also unlocks the Anti-Armor Module.	15	Alien Weaponry	§40	0	50	0	50	10	6x Drone Wrecks
SHIV Advancements II	-	Grants SHIVs Damage Control and Shredder.	30	Cyberdisc Autopsy	§400	135	50	10	80	30	2x Drone Wreck, 2x Cyberdisc Wreck

General Mechanical Unit Upgrades

Name	Credit type	Effects	Prerequisites		Cost
											Other
Advanced Repair	Cybernetics	Reduces aircraft, MEC, SHIV, and item repair times by 35%.	45	Heavy Floater Autopsy	§300	190	0	0	40	30	6x Heavy Floater Corpse
Advanced Servomotors	Cybernetics	All SHIVs gain Sprinter. Unlocks Walker Servos for soldiers and Elerium Turbos for SHIVs.	20	Mechtoid Autopsy	§10	320	60	0	0	15	6x Mechtoid Core
Heavy Shells	Cybernetics	All MECs gain HEAT Warheads.	45	Heavy Floater Interrogation	§100	480	5	0	0	15	5x Heavy Floater Corpse
MEC Warfare Systems	Cybernetics	Vital for further MEC equipment development; prerequisite for the production of many advanced MEC weapons, suits, and items.	20	Alien Biocybernetics	§20	0	10	0	0	5	2x Drone Wreck
Mechanized Defenses	Armor Technology	Unlocks the Alloy Carbide Plating item (and with Advanced Power Armor, the Core Plating item) for MECs and SHIVs to increase their defensive capabilities.	30	Advanced Body Armor	§10	10	7	0	10	15	2x Cyberdisc Wreck
Shaped Armor	Armor Technology	Increases HP of mechanized units (SHIV, MEC) by 3 and KSM penetration by 5.	35	Berserker Autopsy	§20	150	0	20	40	30	4x Berserker Corpse

General Weapon Upgrades

Name	Credit type	Effects	Prerequisites		Cost
											Other
Alien Grenades	-	Allows the use of Alien Grenades and grants AP grenades +2 damage and HE grenades +3 damage.	30	Muton Autopsy	§300	60	75	30	30	20	16x Muton Corpse
Ammo Conservation	Weapons Technology	Increases the ammo capacity of shotguns (primary only), carbines, assault rifles, SMGs, and battle rifles by 1 shot/burst.	60	Muton Elite Autopsy	§150	800	475	0	20	20	10x Muton Elite Corpse
Beam Strengthening	Weapons Technology	Grants +1 to critical hit damage with all primary laser and pulse weapons.	45	Experimental Warfare	§350	90	110	60	15	20	6x UFO Power Source
Condensed Plasma	Plasma Weaponry Weapons Technology	Increases the damage of explosives by 1. Allows production of Plasma Grenades and Plasma Stellerators.	90	Light Plasma Weapons	§200	0	160	180	0	70	5x Muton Elite Corpse
Enhanced Ballistics	Weapons Technology	Allows production of Alloy-Jacketed Rounds.	10	Alien Materials	§20	10	15	0	0	10	-
Enhanced Lasers	Laser Weaponry Weapons Technology	Allows production of Enhanced Beam Optics.	10	Beam Lasers	§20	0	45	10	0	10	-
Jellied Elerium	Cybernetics	Increases the damage of explosives by 1, increases flamethrower panic rolls to 80 (from 50), and unlocks the Incinerator Module.	45	Elerium	§100	0	50	90	20	15	10x Chryssalid Carcass
Quenchguns	Gauss Weaponry Weapons Technology	Grants +1 penetration to all primary ballistic and gauss weapons, and increases the weapon damage of the sawed-off shotgun to 9 (from 6).	35	Advanced Gauss Weapons	§160	80	30	20	0	20	9x Muton Corpse

General Equipment Upgrades

Name	Credit type	Effects	Prerequisites		Cost
											Other
Advanced Flight	Aerospace Technology	Increases the fuel capacity for flight-capable units (flying armors and Hover SHIV) by 50%.	50	Antigrav Systems	§500	80	0	40	0	20	8x Drone Wreck, 8x Heavy Floater Corpse, 8x Floater Corpse
Elerium Batteries	-	Increases the stun rate of the Stun Rifle, and grants an additional charge to the Stun Rifle, Arc Rifle, and the Motion Tracker.	30	Alien Power Systems	§100	30	45	50	0	20	16x Drone Wreck
Improved Medikit	Cybernetics	Increases the max HP medikits can heal by 2.	12	Muton Elite Autopsy	§350	0	0	0	50	10	4x Muton Elite Corpse
New Combat Systems	-	Unlocks an array of new gear options in combination with other technologies and projects.	30	Experimental Warfare	§200	30	60	20	0	20	4x Thin Man Corpse
Psi Warfare Systems	Psionics	Unlocks an assortment of psionic special equipment.	20	Xenopsionics	§200	0	15	20	40	20	6x Sectoid Corpse
Tactical Rigging	Armor Technology	Grants one extra equipment slot to biosoldiers.	30	Muton Interrogation	§50	10	60	80	30	10	4x Muton Corpse

Pistol Upgrades

These upgrades apply to most pistols and machine pistols.

Name	Credit type	Effects	Prerequisites		Cost
											Other
High-Capacity Pistols	Weapons Technology	Grants 1 additional ammo to all non-electric pistols.	10	Alien Weaponry	§100	25	50	0	0	10	-
Rail Pistols	Gauss Weaponry Weapons Technology	Grants 10 aim to all pistols.	20	Gauss Weapons	§150	10	40	0	0	15	2x Seeker Wreck
Reflex Pistols	Plasma Weaponry Weapons Technology	Grants +35% weapon damage to all pistols.	35	Compact Plasma Weapons	§250	30	45	30	0	20	6x Heavy Floater Corpse

Material Recovery

Name	Credit type	Effects	Prerequisites		Cost
											Other
Advanced Scavenging	-	Allows for the use of secondary scavenging teams on UFO missions.	15	Alien Materials	§150	0	0	0	0	15	-
Improved Salvage	-	Increases weapon fragment recovery from missions and destroyed UFOs by 20%.	5	Alien Materials	§800	0	15	0	50	20	20x Thin Man Corpse
Alien Metallurgy	-	Increases alien alloy recovery from missions and destroyed UFOs by 20%.	5	Alien Materials	§800	10	0	0	50	20	10x Drone Wreck
Alien Nucleonics	-	Increases elerium recovery from missions and destroyed UFOs by 20%.	5	Alien Materials	§800	0	0	10	50	20	24x Sectoid Corpse

Base Upgrades

Name	Credit type	Effects	Prerequisites		Cost
											Other
Advanced Surgery	Cybernetics	Decreases biosoldier wound times by 25%.	45	Alien Biocybernetics	§600	0	0	0	0	30	4x Alien Stasis Tank, 4x Alien Surgery
Grey Market	-	Unlocks the Grey Market.	10	-	§10	10	0	10	10	45	1x Sectoid Captive
Operation Rapid Forge	-	Refines recruitment logistics to bring new soldiers on board faster and at reduced cost. Lowers recruitment time by 3 days. Establishes patrol routes staffed by all idle soldiers not actively selected to defend the base. These patrols weaken alien attackers, reducing their HP by an average of 0.5% per soldier on patrol.	25	Beam Lasers	§200	0	0	0	0	5	-
Project Iron Resolve	-	Enhances XCOM Base patrol tactics and defensive readiness while streamlining recruitment efforts. Reduces recruitment time by an additional 3 days. Defensive outposts along patrol routes allow soldiers to engage alien forces more efficiently, reducing fatigue and injuries sustained by patrolling soldiers during an alien assault by 30% and increasing the HP reduction on alien attackers to as average of 0.75% per soldier on patrol.	25	Improved Body Armor Operation Rapid Forge	§400	0	0	0	0	5	-
Aegis Initiative	-	Reinforces XCOM Base patrol positions with cutting-edge defense strategies and reduces psionic training time by 50%. Attacking aliens will have their HP reduced by an average of 1.0% per soldier on patrol due to advanced training, fortifications, and equipment. Reduces fatigue and injuries by 90% for patrol teams, as they defend from fortified locations, damaging aliens before they can retaliate. Further improves recruitment pipelines, lowering recruitment time by an additional 3 days.	25	Alien Command and Control Project Iron Resolve	§600	0	0	0	0	5	-

Aerospace Improvements

Name	Credit type	Effects	Prerequisites		Cost
											Other
Aircraft Boosters	Aerospace Technology Laser Weaponry	Allows production of one-time 'boosters' for interception.	10	Alien Materials	§50	0	10	0	10	10	2x Drone Wreck
Armored Fighters	Aerospace Technology Armor Technology	Increases interceptor and firestorm HP by 30%.	30	Advanced Aerospace Concepts	§450	120	50	0	25	20	16x Floater Corpse
Cooling Coils	Aerospace Technology	Increases rate of fire of all air weapons by 30%.	35	Heavy Floater Interrogation	§80	320	110	0	0	20	4x Cyberdisc Wreck 4x UFO Flight Computer
Elerium Afterburners	Aerospace Technology	Increases aircraft battle speed by 10.	45	Alien Propulsion	§200	60	0	130	0	20	26x UFO Power Source
Improved Avionics	Aerospace Technology	Increases aircraft aim by 10.	40	Advanced Aerospace Concepts	§400	300	60	0	0	20	6x UFO Flight Computer
Phoenix Coilguns	Gauss Weaponry	Upgrades phoenix cannon penetration to Tier 3 (from Tier 2).	15	Gauss Weapons	§40	80	230	0	0	10	12x UFO Power Source
Stealth Satellites	-	Decreases the success chance of unabetted hunts to 50% (from 100%).	65	Stealth Systems	§50	110	0	10	0	10	2x UFO Flight Computer
Supercapacitors	Laser Weaponry	Increases laser cannon damage from 400 to 800. Unlocks Reaper Ammo.	50	Advanced Pulse Lasers	§200	70	40	40	30	5	8x UFO Power Source
UFO Countermeasures	Aerospace Technology	Increases aircraft dodge chance by 10%.	50	Seeker Autopsy	§150	40	75	10	0	20	12x Seeker Wreck 12x UFO Flight Computer
UFO Scanners	-	Increase interception time by 10%. Adds UFO HP estimates to the interception screen.	10	-	§50	0	5	0	0	5	2x UFO Flight Computer
UFO Tracking	Aerospace Technology	Increases interception time by 20%. Increases the chance of aircraft detecting UFOs without satellites present (mimicking patrol behavior) from 7% per aircraft to 14% per aircraft.	40	Alien Power Systems	§300	10	0	10	0	40	2x UFO Flight Computer

Repair Bay

Items can be damaged when a unit is wounded during a battle. If a unit took no base HP damage, there is a 0% chance for the items on that unit to become damaged. If a unit was reduced to 0 health, there's a 20~95% chance for the item to become damaged (depending on the item). The actual chance scales with the percentage of base HP lost. Items with unlimited supply cannot become damaged. Most of the lategame items also cannot become damaged.

Items require 20% of their original build time and 10% of their original build cost to repair. Repairing does not affect item fabrication capacity.

Augment Soldiers

Augment up to 1 soldier at a time to become a MEC. For more information click here: MEC Augmentation