# Ergonomic Design of a Workplace Using Virtual Reality and a Motion Capture Suit
## 4 Methodological Basis for an Ergonomic Rationalisation
### Measurement Using Kinematic Suit with VR before Rationalisation (VRb)  
The study is only conducted on workers with no previous VR experience, which is also a limiting factor of this study. During the actual measurement, employees fill out a paper-based questionnaire. The purpose of the questionnaire is to find out the relevant attributes of the proband: age, gender, dominant arm, height, work engagement--the work engagement of the current work process was scored (scale 0-10, i.e., 0 = unengaged, 10 = expert), weight. While the actual outputs from this questionnaire will not be correlated, they will serve as one input for the discussion of the study results. Immediately after completing the questionnaire, the proband is introduced to the basics of working in a virtual reality environment (such as grasping virtual objects). This familiarisation is practised first outside the VR space, so it is mainly familiarisation with the controllers, then the proband is given a short VR tutorial. This self-tutorial introduces the proband to the basics of movement in a VR environment in about 5 min. Since the measurements are performed in a laboratory area with sufficient space, the use of a so-called 'teleport' is not required for relocation to the workstation. Users can therefore move freely around the designed workplace within the virtual space. Subsequently, the proband is familiarised with all the functions and manipulation of the kinematic suit parts--taking off sensors, fitting belts, turning off sensors, etc. At the beginning of the experiment, it is always necessary to connect the encrypted dongle from the MoCap suit, as well as to connect the router using a USB cable. Then all the sensors in the box are switched on (indicated by a green flashing light). After that, the software for operating the MoCap suit--Axis Studio--needs to be switched on. A new project is created and the dimension points corresponding to the current proband are set. After that, it is necessary to check if the router is connected, the next step is to turn off the magnetic field to speed up the overall calibration. If the measurements are produced in a real environment, typically in an industrial plant where there is a possibility of high magnetic waves, this function needs to be switched on. Subsequently, it is necessary to start linking the SW to the suit, and once the linking is complete, it is possible to put the individual sensors on the proband. The proband is then fitted with straps by the staff which attach the sensors to the kinematic suit. The straps are placed in 17 locations, respecting certain rules which are shown in the figure below. The straps are systematically placed from the feet to the head [40] (see Figure 5). The sensors are then inserted into the straps, always with the emphasis on correct seating. The suit is then calibrated. The starting position for the proband is the 'T pose' (abduction of both upper limbs at 90\({}^{\circ}\), legs together and body erect)--Figure 5. At this stage of the experiment, the actual measurement is not switched on. An important element is that the user should stand in the middle of the on-track area when deploying the HMD display. This area is marked out by the operating staff prior to this measurement. After putting on the glasses, the user is asked to position the glasses on their head themselves so that the image is sufficiently sharp and clear. They are also allowed to test the whole working process without any data capture. This step is particularly important so that the worker knows what the work process looks like when taking a real measurement in order to minimise measurement variations. Once the user has mastered the workflow, they are prompted to start. Subsequently, the proband is asked to stand in the basic position (T pose). A quick recalibration of the MoCap suit is then performed to record the required data as accurately as possible, then the actual recording of the suit's motion is turned on. The proband proceeds in VR according to the set process, which is displayed in the HMD.