*3.1. Objectives*

This review aimed to identify the state-of-the-art on EI, at the confluence of AI, cloud, and edge computing, to bring intelligence as close as possible to the data sources. The survey was conducted to identify the current research trend and research challenges related to EI and to answer the following **Research Questions (RQs):**


**Figure 2.** Flow-chart of the literature review selection process according to the PRISMA guidelines.


**Table 1.** Search plan.
