Journal of Intelligent Systems and Internet of Things JISIoT 2690-6791 2769-786X 10.54216/JISIoT https://www.americaspg.com/journals/show/1138 2019 2019 Faculty of Computers and Informatics, Zagazig University, Zagazig 44519, Sharqiyah, Egypt Ahmed Ahmed Faculty of Computers and Informatics, Zagazig University, Zagazig 44519, Sharqiyah, Egypt Shimaa S. Mohamed In the industry 4.0 idea, new cutting-edge techniques like the Internet of Things (IoT) are advocated. There is still a long way to go before IoT is widely adopted in the circular economy. The goal of this research is to identify the most significant impediments to the integration of IoT in the circular economy in the manufacturing industry. For this purpose, survey research was carried out to provide a framework for the assessment of the hurdles to IoT adoption in the circular economy. This led to a new approach that combines the SWARA and TOPSIS methodologies based on MCDM.  The SWARA model is employed to compute the weights of criteria, while the TOPSIS approach is used to rank different manufacturing businesses under the identified obstacles. 2021 2021 56 68 10.54216/JISIoT.040104 https://www.americaspg.com/articleinfo/18/show/1138