IoT is an important part of business digitization. But in addition, companies already have LM tools in their factories, so their interaction must be key, they must benefit. The development of I4.0, with an IoT that is part of the LM tools, leads us to ask ourselves two questions in relation to the current lines of research and on which cluster scientific development is being grouped. It is something fundamental, which will allow companies to make decisions effectively and clearly. After detecting 147 publications in relation to our research, we carry out a bibliometric analysis, and generate important network maps. They let us know the main authors, as well as countries that are collaborating intensely with each other. What's more, the analysis of the words gave rise to a series of work clusters that ratified the above and allow, together with the above, to answer the questions posed. The results may be interesting to continue research and allow decision makers in companies to have the verified information necessary to move towards digitization, smartmanufacturing, and improve performance in manufacturing and in the use of manufacturing tools. LM.