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.
The USPS recommends that you apply for your passport several months before you need it. Processing times can vary, so itâs better to do it earlier rather than later. Typically, it takes about four weeks to process an application. However, if you need to get your passport in a hurry, they do provide expedited services â such as using Priority Mail. Even though the process sounds a bit intimidating, it remains completely doable â as long as you've done your research! Last updated April 6, 2017.