## 5 Results
### User-Level Validation  
The results obtained from the evaluation of user perceptions, presented in Figure 7, show a significant improvement in most stages of the process associated with the use of the new device. These findings are consistent with the expectations and the value proposition of the developed device, compared to the previous method used in the industry, which relied on a pressure tank. Regarding the ease of device preparation, 80% of respondents reported a significant improvement, rating this aspect as \"Much better\", while 20% rated it as \"Better\". This result suggests that the new system has greatly simplified the initial configuration procedures, contributing to a reduction in non-productive time in routine processes. The evaluation of the time required for preparation revealed that 100% of operators perceived a substantial improvement, rating it as \"Much better\". This finding reinforces the operational efficiency of the new device by reducing the time needed for setup, thereby maximizing productivity. As for the speed of sample preparation and injection, 60% of operators rated this process as \"Much better\" and 40% as \"Better\". While the improvement is clear, the distribution of responses suggests that further improvements to the device may still be possible. However, in its current state of development, it already makes a significant contribution.  
Figure 7: Result of the user survey.  
Additionally, the efficiency of sample preparation and injection was positively evaluated, with 60% of users rating it as \"Better\" and 40% as \"Much better\". This indicates that the new device has significantly improved consistency in these stages, although the balance of responses suggests that the perception of efficiency may be influenced by external factors, such as the sample type or the operator's experience.  
Regarding the measurement time, no significant differences were observed, as 100% of respondents indicated that this stage is \"The same\" compared to the previous method. This result could be explained by the fact that measurement time depends more on the intrinsic properties of the sample than on the device itself.  
Important improvement was seen in the ease of cleaning, with 100% of operators rating this aspect as \"Much better\". This result suggests that the design of the new device has significantly simplified the cleaning process, which is essential for maintaining high hygiene standards and reducing downtime between analyses. In line with this, the cleaning time was unanimously rated as \"Much better\", confirming the new system's efficiency in reducing the time allocated to this stage. This is key for optimizing workflow in laboratories with high operational demand.  
Regarding safety conditions, 80% of users rated them as \"Much better\" and 20% as \"Better\", indicating a general perception that the new device is safer and more reliable, reducing risks associated with handling the equipment and contributing to a safer working environment.  
The total processing time was unanimously rated as \"Much better\" by 100% of respondents. This reflects an overall optimization of the process, from device preparation to the completion of cleaning tasks. This finding highlights that the new device has not only improved individual process stages but has also had a positive impact on overall efficiency, increasing the laboratory's processing capacity.  
Lastly, users provided several suggestions to further improve the design and operation of the device. A recurring recommendation was the incorporation of a computer connection for automatic data capture during analysis, which would streamline data recording and allow for calculations to be performed immediately. This type of improvement would not only reduce the risk of manual data entry errors but also optimize the time spent evaluating and analyzing results, further maximizing process efficiency.