## 3 Re-Usable Re-Constructible Sensor Device
### Software
#### 3.3.1 Intelligent Calibration
They were then asked to follow the instructions and assemble the motion sensor device. Participants were informed that they could ask questions as needed and express any opinions they had about the process. During this time, the participants were observed, and notes were taken on where they struggled or made mistakes. As this testing took place within office spaces, some of the participants were interrupted during the assembly process. However, they were able to find where they had left off with apparent ease. Once the participants had finished assembling, they were then instructed to mount the device on their computer monitor and plug it into a USB port. After mounting the device, they were asked to launch the software and follow the calibration instructions to ensure the device was functioning as intended. Once calibrated, the participants were instructed toclose the software and then given the first survey. The motion sensor device was installed for 5-7 days, after which the participants were asked to relaunch the software and rerun the calibration to ensure that the device had not been bumped into or moved during the testing period. After this, the device was collected, and the participants were given the second survey. #### 4.2.4 Data Analysis

The descriptive statistics of the survey data are provided in tabular form. Most of the data collected was skewed positively due to a small sample size. Thus, medians and semi-interquartile ranges (SIQR) were reported in addition to means and standard deviations (SD). The free-text answers and observational data were analyzed using a priori thematic analysis to illustrate the findings further. ### Results

This section presents the survey responses from users. #### 4.3.1 Construction Capabilities

The first survey items pertained directly to the product's ease of use. For the most part, agreement was recognized among the participants. Some variability was observed, primarily in the participants' ability to calibrate the motion sensor device. As one participant was assembling the device, it was observed that they were making folds that the instructions had not yet instructed them to. The time to completion varied among users, but all were observed to complete the assembly in under 6 min. Table 2 summarizes the ease of use observations. The following table (Table 3) shows the participants' attitudes toward consumer products in general. The agreement was mostly recognized, with complete agreement on liking products that are made from recycled materials and those that can be customized. \begin{table}
\begin{tabular}{c c c c c} \hline
**Question** & **Mean** & **SD** & **Median** & **SIQR** \\ \hline I enjoyed assembling the & 4.83 & 0.41 & 5 & 0 \\ sensor housing. & 5 & 0 & 5 & 0 \\ sensor housing. & 4.5 & 0.55 & 4.5 & 0.5 \\ The sensor was compatible & 4.33 & 0.82 & 4.5 & 0.5 \\ with my current & 4.33 & 0.82 & 4.5 & 0.5 \\ computer setup. & 3.67 & 1.21 & 3.5 & 0.87 \\ I found it easy to calibrate & 3.67 & 1.21 & 3.5 & 0.87 \\ the model. & & & & \\ \hline \end{tabular}
\end{table} 
Table 2: Ease of use questions. #### 4.3.2 Circular Economy Capabilities

Prior knowledge of sustainable and circular design practices suggested that participants were generally favorable. However, there was far more variability in the responses regarding experience with repairing. One participant commented that their inexperience with repairing was due to a general lack of accessibility regarding product repair. Table 4 shows the user responses about prior knowledge. When asked how well the motion sensor device performed throughout the study, participants reported that their device stayed in place. One participant commented that they were unsure of the longevity of the mounting arm, as even though it remained in place, it had warped slightly during installation. Table 5 presents the performance of the device and its perception among the users.