Outsourcing technology processes and systems versus internally administering these IT needs

How would you compare and contrast outsourcing technology processes and systems versus internally administering these IT needs? Critique the determining factors for evaluating software tools that could potentially be used in assessing the IT infrastructure (systems and software) for optimization and improvement. Optional reading Guide to Outsourcing IT Services https://www.preludeservices.com/blog/guide-to-outsourcing-it-services/