Between each of the three organization types listed in the lecture, it is hard to say which is the most effective. I think it primarily depends on the size of the company or other factors. As a side note, even though it was mentioned that the departments in functional organizations are silos, this is not necessarily always true. The company I’ve been working for is a functional organization and the departments definitely communicate with each other. There is still a lot of miscommunication though so I cannot say it’s the most effective.