The optimal size of a workshop is 240m²: each 12m² allow you to add a working prisoner in the workshop, with a maximum of 20 prisoners working in it.
In alpha 9 and 10, it is not required that the workshop be indoors. However, if it is outdoors, it must to be enclosed in a wall or fence for prisoners to be assigned to it under deployment.
Completed license plates will be placed on the floor unless a table is present in the workshop. If there is a table in any workshop prisoners will place the finished licence plates on it. If there is no room on the floor or on a table, prisoners will place the license plates in a storage room.
Stacks of finished License plates are taken to the export room by prisoners or workmen. From there, they will be loaded into trucks and you will receive the money as soon as the trucks reach the border.
As of Alpha 16, wood can be sawn in the workshop to make planks; these are sold automatically at 1am. As of Alpha 18, prisoners must learn the workshop safety program before they can work in the workshop and can study an advanced course in order to craft the wood into carpentry items.
Prior to alpha 9, the workshop had just one requirement, that being a minimal size of 5x5, and gave $2 per room tile each day. However this is no longer the function of the room and no money is given for tiles alone. Alpha 9 made the workshop a prison labor room, allowing players to earn much more money from it each day than before.