# A Review on Recent Trends and Applications of IoT in Additive Manufacturing
## 4 Conclusions  
This literature-based analysis focused on the importance of integrating the IoT and AM technologies. This review will give engineers and future researchers in academia and industry applications a better grasp of how to attain the IoT and state-of-the-art AM. AM is a dominant trend in manufacturing technology; however, it cannot replace conventional manufacturing techniques due to its inability to mass produce quickly. As a viable solution, this article suggests that IoT adds benefits to AM by enabling improved control and management of many processes through the incorporation of new tools and technology. Collecting data from processes, machines, etc., and providing them to decision-makers on a real-time basis enables the on-demand manufacturing of customized products. Conventional processes can deliberately be replaced by intelligent technologies (IT), limiting human intervention, increasing productivity, developing design standards, etc. This study compared the merits of implementing this technology with its limitations and some of its most recent applications. 1. Human augmentation can radically transform the community for better or worse by extending human capacities beyond their natural boundaries with the help of rapid prototyping of several augmenting devices. It also plays a significant role in enhancing human productivity through new emerging concepts of AI. 2. Digital twin technology will be a future hologram of several systems by integrating its sensory technologies for replicating physical twins with modern manufacturing 3D printing technology, and this can overcome several drawbacks in the manufacturing field by decreasing complexity in designing and prototyping. 3. The performance of 3D scanners will improve by overcoming restrictions in data collection, modeling, and inspection parameters through the integration of IT technologies and the facilitation of AM printing. 4. Bio-printers face challenges in handling and storing toxic wastes produced during the bio-printing process, and these can be minimized with this technology by close monitoring and this will lead to advancement towards a greater extent in the future. 5. The ease of printing processes using IoT-enabled AM technology is helping to overcome printing defects such as porosity, surface roughness, microstructural discontinuity, etc. The IoT is helping to avoid those defects by proper selection of parameters during 3D printing. Based on the IoT, which connects the digital and physical worlds through AM processes, the concept of IoT-integrated AM can contribute significantly to assisting new manufacturing processes in a variety of industries, as well as promoting gains such as productivity, customization, ergonomics, flexibility, automation, integration, optimization, and innovation. Based on the challenges presented in this work, future research efforts should \begin{table}
\begin{tabular}{c c c c c} \hline \hline
**S. No** & **Name** & **Applications** & **Advantages** & **Limitations** \\ \hline \multirow{4}{*}{4} & \multirow{4}{*}{Bio Printing} & \multirow{4}{*}{Reconstruction of body tissues} & An alternative to fill the organ shortage & Emission of harmful chemicals \\  & & Transplantable organs & Fast than organ donation & Poor biocompatibility \\  & & Skin & Decrease animal killing & Lack of bioactive material \\  & & Muscular-skeletal tissue & The accurate shape and size of the organ can & Need of low viscosity biomaterial \\  & & & be printed & \\  & & Myocardial tissue Blood vessel & & \\ \hline \multirow{4}{*}{5} & \multirow{4}{*}{Optimization in parameters} & \multirow{4}{*}{Deposition/scanning speed} & Reduction in production cost & Temperature controlling \\  & & & Reduction in material wastage & Surface roughness issue \\ \cline{1-1}  & & Path planning & Controlled deposition & \\ \hline \hline \end{tabular}
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