The Workshop is one of the more useful facilities, allowing you to use 2 (and after upgrading it, 4) drones, which serve the same purpose as your engineers - those can be used to enhance nearby buildings. There are two "catches" here - you can only affect the buildings that are adjacent to the Workshop (the one above, below and to the right and left) and you will have to use 1 or 2 (for 2 and 4 drones respectively) engineers to operate the facility. However, the effect is worth the effort - for 2 engineers you will gain 4 drones, doubling their (engineers') effectiveness.
Additionally, this is one of the facilities that can be demolished as you make progress in the game, but you shouldn't do that before you have enough engineers to fill all the facilities, and all the excavations are complete.
More information on the facility can be found in the "Base development" section of this guide.
Upgrades and staff influence
Construction takes 20 days.
Monthly upkeep cost - 35x Supplies.
- Allows you to use up to 4 drones, which can be used to operate buildings like normal engineers.
Additional Workbench: allows you to fill the facility with another engineer.
Cost: 100x Supplies, 2 Power. Monthly upkeep cost - 45x Supplies.
Staff: up to two engineers, each giving you access to 2 drones.