# Optimization of Wiring Harness Logistics Flow
## 3 Results and Discussion
### Methods for Production Waste Collection and Recycling in Wiring Harness Manufacturing  
Due to the valuable metals they contain, recycling waste generated from wiring assembly is necessary for pollution reduction and the recovery of limited resources. Wiring harness manufacturers generally adopt a policy to reduce waste and streamline their collection. For wire scraps, connectors, protections, and other elements resulting from wiring production, selective collection is attempted wherever possible, based on the material type and the stage in the production process whereat the waste occurs. Collection is carried out at each stage using temporary storage containers. The final storage is facilitated through large containers, then transported to specialized companies engaged in waste recycling from various production sectors. Recycling firms are dedicated to developing new recycling methods to increase material recovery rates, particularly for valuable metals like copper, gold, and silver [24]. This involves reducing both the number of manual waste sorting operations and the environmental impacts of the recycling process, including carbon emissions. \begin{table}
\begin{tabular}{c c c c c c c c} \hline \hline \(x_{1}\) & \(x_{2}\) & \(x_{3}\) & \(s_{1}\) & \(s_{2}\) & \(s_{3}\) & \(f\) & \(b\) & **Ratio** \\ \hline
1 & 1 & 1 & 0.53 & 0 & 0 & 0 & 2.80 & \\ \hline \(-0.1\) & \(-0.1\) & 0 & \(-1\) & 1 & 0 & 0 & 0.11 & \\ \hline
0 & 0 & 0 & \(-0.95\) & 0 & 1 & 0 & 0.41 & \\ \hline
0.1 & 0.1 & 0 & 1 & 0 & 0 & 1 & \\ \hline \hline \end{tabular}
\end{table} 
Table 7: The first iteration for the Simplex algorithm. \begin{table}
\begin{tabular}{c c c c} \hline \hline \multicolumn{2}{c}{**Initial Values**} & \multicolumn{2}{c}{**Final Values**} \\ \hline
**Workstation** & **Time (min)** & **Workstation** & **Time (min)** \\ \hline
1 & 5.50 & 1 & 5.30 \\ \hline
2 & 5.50 & 2 & 5.41 \\ \hline
3 & 5.60 & 3 & 5.43 \\ \hline
4 & 5.60 & 4 & 5.32 \\ \hline
5 & 5.50 & 5 & 5.41 \\ \hline
6 & 5.60 & 6 & 5.32 \\ \hline
7 & 5.51 & 7 & 5.32 \\ \hline
8 & 5.51 & 8 & 5.41 \\ \hline
9 & 5.94 & 9 & 5.32 \\ \hline
10 & 5.94 & 10 & 5.34 \\ \hline \hline \end{tabular}
\end{table} 
Table 8: Initial values and final values for workstations 1–10. Usually, the production waste collection is managed by integrating collection bins within a wiring harness assembly line. The most common collection systems include at least one of the following features:  
* Collection bins or stations--At various points along the assembly line, collection bins are strategically placed to gather scrap materials such as cut-off wire lengths, excess insulation, and other discarded components;
* Segregation and labeling--When cycle time and available space are not constraints, the collection bins can be labeled to indicate the type of material that should be placed within them. For instance, there may be separate bins for copper wire scraps, plastic insulation scraps, and other specific materials;
* Centralized collection points--Depending on the size of the production facility, there may be centralized collection points where all the collected bins are gathered for later processing. Manufacturers can efficiently manage scrap materials by integrating collection bins at strategic points along the assembly line, making reclaiming valuable resources and reducing waste easier. A typical example of a scrap collecting system in wiring harness production involves the organized collection and segregation of discarded or excess materials from the manufacturing process. Once the bins are filled or at regular intervals, the collected scrap materials are transported to recycling facilities or processing centers where they can be reclaimed, processed, and prepared for reuse in the production process.