## 4 Result and Discussion
### Stage 3: Producing a Causal Diagram
Furthermore, \"high purchasing cost of environmentally friendly materials (B2)\", \"lack of support supply and demand network (B4)\", \"design challenge to reuse and recovery products (B6)\", \"limited availability and quality of recycling material (B7)\", \"high short- term costs and low short-term economic benefits (B11)\", and \"make the right decision to implement CE in the most efficient way (B12)\" are determined as the effect group. These are influenced by cause group barriers and affect the implementation of CE in the textile sector. It may be noted that \"consumers lack of knowledge and awareness about reused/recycle (B1)\" has identified as a highly significant positive impact among all barriers, confirming that the lack of knowledge about the reusing materials among customers plays a key role in CE implementation of the textile sector. In addition, \"lack of successful business models and frameworks to implement CE (B3)\" is also a critical barrier among the 12 CE implementation barriers in the textile sector, and is the second criterion to consider; the following barriers are B2, B6, B7, and B11. These findings imply that these cause group barriers may improve the effect group barriers if the textile companies' top management can set up the information related to reuse/recycle measures to the supply chain members first and then design the reuse and recovery products. These steps would increase customer satisfaction and public reputation. Thus, the most effective group barriers or core issues including high purchasing cost of environmentally friendly materials (B2), design challenge to reuse and recovery products (B6), limited availability and quality of recycling material (B7) will be readily solved. The \"insufficient internalization of external costs (B10)\" is closer to the center among all barriers. It shows the identified causal group barriers and barriers that influence it less, namely, make the right decision to implement CE in the most efficient way (B12) was established to have a lower significance weight. As shown in Figure 3, the digraph of net cause and effect is drawn. Finally, after comparing with the threshold value as shown in Table 7, a directed graph for the barriers is created to show the relationship, as shown in Figure 3.  
Further, we draw the causal interrelationships graph of CE barriers in the textile sector based on the T matrix results, as shown in Table 7, and the interaction among the CE key barriers is shown in Figure 3. The double arrow-headed lines indicate the causal interactions among each pair of barriers, whereas single dotted-arrow lines represent less influence between each other, as shown in Figure 3. It has been found that \"high purchasing cost of environmentally friendly materials (B2)\" has strong interactions with another barrier, and the barriers for \"design challenge to reuse and recovery products (B6)\", \"limited availability and quality of recycling material (B7)\" are further related by highly influencing, or having more interactions with, other barriers of CE implementation in the textile sector. Therefore, the textile companies need to control those key barriers to implement CE in their textile supply chain.