Lotus Sit Stand Workstation 0007901, 0009901: No, the workstation comes fully assembled out of the box.
Lotus VE Sit Stand Workstation 8080101, 8082001: Yes, there is limited assembly required which should take anywhere from 10-20 minutes. There are only 4 major pieces that need to be assembled together.
Lotus DX Sit Stand Workstation 8080301, 8080201: No, the workstation comes fully assembled out of the box. However, to enable the USB and Wireless Charging functionality you will need to plug in the power cable and connect the rear USB hub to your computer with the provided Type B/USB Cord. The instruction manual will provide directions as well as pictures.
Lotus RT Sit Stand Workstation 8081501, 8081601, 8081701, 8081801: Yes, there is limited assembly required which should take anywhere from 5-10 minutes. You will need to attach the clamp, monitor arm and adjust the tension of the unit. The instruction manual will provide directions as well as pictures.