There is consensus among both the research and industrial communities, and even the general public, that condiment manufacturing (AM) processes capable of processing metallic materials are a set up of game changing technologies that offering unique capabilities with tremendous application potential that cannot be matched by traditional manufacturing technologies. Unfortunately, with all what AM has to offer, the quality and repeatability of metal parts still hamper significantly their widespread as feasible manufacturing processes. This is particularly true in industrial sectors with stringent requirements on part quality such as the aerospace and healthcare sectors. One approach to overcome this challenge that has recently been receiving increasing attention is process monitoring and real-time procedure control to enhance function quality and repeatability. This has been addressed by numerous research efforts in the past decade and continues to be identified equally a loftier priority research goal. In this review paper, we fill up an important gap in the literature represented by the absence of one single source that comprehensively describes what has been achieved and provides insight on what still needs to exist accomplished in the field of process monitoring and control for metal-based AM processes.

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