# Concept of Virtual Reality Training of Facility Management Employees Using Eye Tracking
## 3 Virtual Reality Training and Evaluation Scenarios  
Virtual training of an employee in FM tasks must be preceded by initial training in the use of tools and moving around in the VR environment. Correct implementation of initial training allows for obtaining reliable results during the fundamental training. To carry out the initial training, a separate VR training module was created containing a set of workstations, enabling learning to perform specific activities in the VR environment (Figure 1):  
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* Login station--the user enters their data. * Transport station--the user learns to move around in the VR. * Tablet station--the user learns to analyze the content of the task and mark the answers on the tablet. * Physical interaction station--the user learns to interact physically with virtual objects. * Object positioning station--the user learns to move several objects simultaneously. * Big objects station--the user learns to move several smaller objects on a large object. * Tool selection station--the user learns to select and use the appropriate tools. * Cleaning station--the user learns to use the tool on a large object. * Buttons station--the user learns to turn buttons on the object. * Distance station--the user learns to verify the object's distance. * Handle interaction station--the user learns how to handle moving objects manually. Figure 1: The appearance of workstations in a virtual environment: (**a**) tablet station (Tablet: Look at the tablet and read the task. To confirm the answer, touch the button on the tablet and then press the trigger of the controller. ), (**b**) physical interaction station (Physical Interaction: You can interact with objects like in the real world. Press the red button to check the lighting change. Then move to the next position. ), (**c**) object positioning station (Clusters of objects: Sometimes, you must check several objects simultaneously. Press the red button and read the instructions on the tablet. ), (**d**) tool selection station (Tool Selection: Choose the right tool and match it to the correct part. The green indicator light will turn on when the operation is performed correctly. Remember to put the tool back in its place. ), (**e**) cleaning station (Cleaning: There is a sponge in front of you, which will be used to clean the dirty surface. Grab it and use it on a dirty surface. When the surface is clean enough, the green light will turn on), and (**f**) distance station (Value reading: Take the measuring device before you and point the laser at the bulb. A numerical value will appear on the device. Remember it, put the measuring device back in its place, enter the saved value on the tablet, and then confirm the answer.). The advanced VR training and evaluation modules concerned the operation of the following equipment: fire pump station, HVAC roof station (heating, ventilation, and air conditioning), and air conditioning unit. The modeled activities represent typical tasks performed by FM employees. FM tasks are not related to each other, i.e., the result of one task does not affect the other, but also, in many tasks, the same object can be set differently. Examples of tasks performed in each module are as follows:  
* Fire pump station: check that the room heating is working correctly, verify the correctness of the pressure gauge indications, or check that the battery chargers show the correct values. * HVAC roof station: check that the electric system is working correctly, check the tightness of chimney ducts, and check the gas pressure. * Air conditioning unit: check the temperature-rising function of the indoor air conditioner, disinfect the air conditioner evaporator, and clean the air conditioner turbine. Each module was designed as a virtual room of 80 \(\times\) 30 m with a minimum of 50 activity points and 30 FM tasks.