Sometimes the team does not use the usability lab
if the testing requires special hardware or if the lab is not available.
In a previous overview of usability labs
, Nielsen  focuses on quantitative measurements of the physical characteristics of the lab: size of the floor space, number of rooms, number of cameras, existence of one-way mirrors, and number of staff' members.
At the beginning of development, technical communicators completed all testing since there was no central usability lab
NeuroLab by CoolTool is a comprehensive solution for research agencies and usability labs
, which includes Eye Tracking, Emotion Measurement, EEG: brain activity, Mouse Tracking, Implicit Priming Test, and Surveys, which can be used separately or together.