In this paper, we highlighted the importance of integrating environmental goals into the production system. We recommend the establishment of closed-loop production systems in a supply chain level. To realize closed-loop production systems, we introduced the concept of sustainable supply chain networks. With a SSCN, it is possible to shift successfully from a flow economy to a circular economy by combining environmental and economic issues, thereby improving eco-efficiency.
Standard passport processing generally takes between four to six weeks, but it can take longer during peak travel times.
Places to Get a Passport. The location you submit your passport application can determine how long it takes to get your travel document. Applications that are mailed in either directly or through a passport office can take up to 6 weeks for standard processing or up to 3 weeks if they are expedited. Again, processing times are affected by the factors listed above. United States citizens can apply at a regional agency in order to get a passport faster. Evidence of a departure date within two weeks is required or within four weeks if you also need to obtain a travel visa.